Opal Mineral Specimens:
Natural Boulder Opal Specimens, Common Opal Rough, and Precious Opal Specimens

Natural Common Opal Specimens
	Item: opam156x available in several small sizes (please see below) These genuine opal specimens were mined in the USA These natural opal specimens have thick layers of common opal in shades with white, tan, and pale yellow-green (completely natural untreated colors) with large areas of very nice cabochon gem or carving grade. The photo at left is viewed under incandescent light. We have these natural opal specimens available in small to medium sizes that are perfect for mineral collections, as samples for classroom study, and for metaphysical use. Please see below to order.
1.75 inch Natural Common Opal Specimens	1 2 3 4 5 6 7 8 9 10 11 12 13 14
Item: opam156b Price: $2.50
2.5 inch Natural Common Opal Specimens	1 2 3 4 5 6 7 8 9 10 11
Item: opam156d Price: $4.95
3 inch Natural Common Opal Specimens	1 2 3 4 5 6 7 8 9 10 11
Item: opam156e Price: $8.50
Pink and White Opal Specimen, Lapidary Grade
	This unique item is sold. Item: opam164 0.65 Lbs 3.9" x 3.5" x 2.1" (99mm x 90mm x 53mm) Price: $19.50 This piece of natural opal has a mottled brecia pattern of white, light pink, and reddish-pink colors. It is fine lapidary grade and would yield a wonderful carving or a 1.5 inch diameter sphere, with plenty of material left over for cabochons, etc. The older exposed surfaces of this natural opal rough specimen are oxidized to white, brown and gray colors. Freshly broken surfaces reveal the beautiful white & pink colors inside.
Pink and White Opal Specimen, Lapidary Grade
	This unique item is sold. Item: opam165 0.95 Lbs 4.5" x 3.4" x 3.2" (114mm x 86mm x 82mm) Price: $28.50 This piece of natural opal has a mottled brecia pattern of white, light pink, and purple-pink colors. The older exposed surfaces of this natural opal rough specimen are oxidized to white, brown and gray colors. Freshly broken surfaces reveal the beautiful white & pink colors inside. It is fine lapidary grade and would yield a single large carving or a 1.8 inch diameter sphere, with plenty of material left over for cabochons, etc.
Pink and White Opal Specimen
	This unique item is sold. Item: opam166 1.8 Lbs 6.4" x 4.0" x 3.5" (162mm x 102mm x 89mm) Price: $54.00 This piece of natural opal has a mottled brecia pattern of white, light pink, and red-pink colors. The older exposed surfaces of this natural color opal rough specimen are oxidized to white, brown and gray colors. Freshly broken surfaces reveal the beautiful white & pink colors inside. It is fine lapidary grade and would yield a single large carving or a couple of 2 inch diameter spheres, with plenty of material left over for cabochons, etc.
Pink and White Opal Specimen
	Item: opam167 3.8 Lbs 8" x 5" x 3.5" Price: $114.00 This piece of natural opal has a mottled brecia pattern of white, light pink, and red-pink colors. The older exposed surfaces of this natural opal rough specimen are oxidied to white, brown and gray colors. Freshly broken surfaces reveal the beautiful white & pink colors inside. It is fine lapidary grade and would yield a single large carving or several 2.5 inch diameter spheres, with plenty of material left over for cabochons, etc.
Pink and White Opal Specimen, 36 pounds
	Item: opam168 36 Lbs 15.5" x 9" x 8" Price: $466.20 This large boulder of natural opal has a mottled brecia pattern of white, light pink, and red-pink colors. All of its surfaces but one are older exposed surfaces that have oxidized to white. There is one freshly broken surface across the top that reveals the beautiful white & pink mottled colors inside. Most of its interior is fine lapidary grade with crust on some surfaces. It would yield a single large amazing carving, or a couple of 4 to 5 inch diameter spheres, with plenty of material left over for cabochons, etc.
Boulder Opal Mineral Specimen
	This unique item is sold. Item: opam155 0.2 Lbs 2" x 1.7" x 1.4" ( 52 x 44 x 35mm) mined in Queensland, Australia Price: $34.50 This piece of 100% natural boulder opal rough consists of brown clay-ironstone matrix with thin seams of precious opal. Within the opal there are areas with intense purple-blue colors. This mineral specimen is completely natural boulder opal, with no dyes, glues, laminations or fillers.
Boulder Opal Specimen
	This unique item is sold. Item: opam161 0.4 Lbs 3.2" x 2" x 1.2" (82mm x 52mm x 31mm) Queensland, Australia Price: $82.50 This piece of natural boulder opal has poished surfaces. It consists of brown clay-ironstone matrix with a thin seam of precious opal on its upper surface. Within the opal there are areas with flashes of green and blue-purple. Other than its polished surfaces, this mineral specimen is completely natural boulder opal, with no dyes, glues, laminations or fillers.
Boulder Opal Mineral Specimen
	This unique item is sold. Item: opam147 0.6 Lbs 2.9" x 2.9" x 2.2" ( 74 x 74 x 55mm) mined in Queensland, Australia Price: $84.50 This piece of 100% natural boulder opal rough consists of brown clay-ironstone matrix with thin seams of precious opal on some surfaces. Within the opal there are areas with flashes of blue-purple and blue-green colors. This mineral specimen is completely natural boulder opal, with no dyes, glues, laminations or fillers.
Boulder Opal Specimen
	Item: opam162 This natural boulder opal weighs 0.25 Lbs Boulder opal dimensions: 2.3" x 1.7" x 1" (59mm x 44mm x 26mm) Discovered in Queensland, Australia Price: $132.50 This polished piece of natural boulder opal consists of brown clay-ironstone matrix with thin seams of precious opal on its top and bottom surfaces. Within the opal there are areas with natural flashes of green, blue and purple colors! Other than its polished surfaces, this mineral specimen is completely natural boulder opal, with no dyes, glues, laminations or fillers. See also a back-view photo.
Boulder Opal Specimen
	Item: opam163 This natural boulder opal weighs 0.2 Lbs Measument: 1.8" x 1.7" x 1.2" (45mm x 44mm x 31mm) Found in Queensland, Australia Price: $134.50 This polished piece of 100% natural boulder opal consists of brown clay-ironstone matrix with a thin seam of precious opal on its upper surface. Within the opal there are areas with natural flashes of bright green, blue and reddish-orange! Other than some polished surfaces, this mineral specimen is completely natural boulder opal, with no dyes, glues, laminations or fillers.
Boulder Opal Mineral Specimen
	Item: opam144 This boulder opal specimens measure: 2.6" x 2.2" x 1.5" ( 67 x 57 x 37mm ) Mined in Queensland, Australia Price: $112.50 This piece of natural boulder opal consists of brown clay-ironstone matrix with a thin seam of precious opal. Within the opal there are areas of intense flashes of green, and some blueish-purple colors. Other than its polished surfaces, this mineral specimen is completely natural boulder opal, with no dyes, glues, laminations or fillers. The photo at left shows a close-up photo, see also a full-view photo.
Boulder Opal Mineral Specimen
	Item: opam145 This genuine boulder opal is 3.8" x 1.5" x 1.1" ( 98.5 x 39 x 28mm ) Mined in Queensland, Australia Price: $184.50 This specimen of natural boulder opal rough consists of brown clay-ironstone matrix with a thin seam of precious opal. Within the opal there are areas with intense flashes of green, orange-red and some blueish-purple colors. Other than its polished surfaces, this mineral specimen is completely natural boulder opal, with no dyes, glues, laminations or fillers. The photo at left shows a close-up photo, see also a full-view photo.
Welo Opal Gemstone
	Item: opag144_Welo-crystal-opal-gemstone This natural opal gemstone weighs 0.95 carats Welo Opal Gem Dimensions: 11.4mm x 7.0mm x 3.4mm deep This natural precious opal gem was found in the Welo Province of Ethiopia Price: $85.50 This unique Welo opal gemstone was ground & polished into a pear shaped cabochon from natural crystal opal rough that was mined in Ethiopia. This opal gem is completely natural with no dyes, no glues, no laminations, and no treatments of any kind. This superior quality opal gem is flawless with no imperfections. It is transparent with natural color play inside. Transparent opals with color play are also known as crystal opal gems. This fine quality Welo opal gemstone has flashes of green, orange and red color play inside! The fine opal gemstone you see displayed at left is the actual one you will receive.
Ethiopian Welo Opal Gemstone
	Item: opag146_Welo-crystal-opal-gemstone This natural opal gemstone weighs 3.06 carats Ethiopian Crystal Opal Gem Dimensions: 10.2mm round x 6.5mm deep This natural precious opal gem was found in the Welo Province of Ethiopia Price: $328.95 This unique Welo opal gemstone was ground & polished into a round cabochon shape from natural crystal opal rough that was mined in Ethiopia. This opal gem is completely natural with no dyes, no glues, no laminations, and no treatments of any kind. This superior quality opal gem is flawless with no imperfections. It is transparent with natural color play inside. Transparent opals with color play are also known as crystal opal gems. This fine quality Welo opal gemstone has flashes of wonderful green with some red color play inside as you turn the gem. See another view of this superior quality natural Welo opal gemstone. The fine opal gemstone you see in these two photos is the actual one you will receive.
Welo Opal Gemstone
	Item: opag147_Welo-crystal-opal-gemstone This natural opal gemstone weighs 3.06 carats Crystal Opal Gem Dimensions: 14.8mm x 9.8mm x 5.0mm deep This natural precious opal gem was found in the Welo Province of Ethiopia Price: $492.75 This unique Welo opal gemstone was ground & polished into an oval cabochon shape from natural crystal opal rough that was mined in Ethiopia. This opal gem is completely natural with no dyes, no glues, no laminations, and no treatments of any kind. This superior quality opal gem is flawless with no imperfections. It is transparent with natural color play inside. Transparent opals with color play are also known as crystal opal gems. This fine quality Welo opal gemstone has flashes of wonderful green, orange and red color play inside as you turn the gem. See another view of this superior quality natural Ethiopian opal gemstone. The fine opal gemstone you see in these two photos is the actual one you will receive.
Boulder Opal Gemstone
	This unique item is sold. Item: opag149_boulder-opal-gemstone This natural boulder opal gem weighs 36.65 carats Boulder Opal Gem Dimensions: 1 x 0.8 x 0.3 thick (25.5mm x 20mm x 8mm) Price: $108.50 This unique boulder opal gemstone was ground & polished into a free-form cabochon shape from natural boulder opal rough that was mined in Australia. This boulder opal gem is completely natural with no dyes, glues, laminations or fillers. The boulder opal has a dark brown clay-ironstone matrix, and within the opal there are areas with beautiful bright green and blue-purple colors as you turn the piece. It makes a great specimen of natural Australian boulder opal just as it is, although this genuine boulder opal gem would make a wonderful boulder opal jewelry design as well.
Boulder Opal Gemstone
	Item: opag150_boulder-opal-gemstone This natural boulder opal gem weighs 31.02 carats Boulder Opal Gem Dimensions: 1.1 x 0.7 x 0.3 thick (28mm x 16.5mm x 8mm) Price: $122.50 This unique boulder opal gemstone was ground & polished into a free-form cabochon shape from natural boulder opal rough that was mined in Australia. This boulder opal gem is completely natural with no dyes, glues, laminations or fillers. There is lots of opal in this gem, the opal is intergrown with dark brown clay-ironstone matrix, and within the opal there are areas with beautiful green and blue-purple colors as you turn the piece. It makes a great specimen of natural Australian boulder opal just as it is, although this genuine boulder opal gem would make a wonderful boulder opal jewelry design as well.
Boulder Opal Gemstone, 75.73 carats
	This unique item is sold. Item: opag140_boulder-opal-gemstone This genuine boulder opal gem weighs carats75.73 Boulder Opal Gem Dimensions: 1.9 x 0.8 x 0.4 thick (49mm x 21mm x 9mm) Price: $212.50 This unique boulder opal gemstone was ground & polished into a free-form cabochon shape from natural boulder opal rough that was mined in Australia. This boulder opal gem is completely natural with no dyes, glues, laminations or fillers. The boulder opal has a dark brown clay-ironstone matrix, and within the opal there are areas with beautiful green and blue-purple colors as you turn the piece. It makes a great specimen of natural Australian boulder opal just as it is, although this genuine boulder opal gem would make a wonderful boulder jewelry item as well.
Boulder Opal Gemstone, 197.42 carats
	Item: opag142 _boulder-opal-gemstone This genuine boulder opal gem weighs 197.42 carats Boulder Opal Gem Dimensions: 2.4 x 1.7 x 0.3 thick (62mm x 44mm x 8mm) Price: $264.25 This unique boulder opal gemstone was ground & polished into a free-form cabochon shape from natural boulder opal rough that was mined in Australia. This boulder opal specimen has a relatively thin flat shape. It is completely natural with no dyes, glues, laminations or fillers. The boulder opal has a dark brown clay-ironstone matrix, and within the opal there are areas with intense green and blue-purple flashes as you turn the piece. It makes a great specimen of natural Australian boulder opal just as it is, although ths genuine boulder opal gem would make a wonderful boulder opal gemstone jewelry design as well. See also a full-view photo and a back-view photo.
Precious Opal Shell Fossil
	Item: opag132 43.25 carats 34 X 30 X 11 mm Mined in Australia Price: $280.00 This genuine opal fossil clam mined in Australia contains multicolors of crystal opal in predominately greens, blue through violet, to purple colors within a slightly bluish body color. The precious opal shell thickness is from 2 MM to over 5 MM thick covering a sandstone center. It is an excellent specimen as is but could be polished to bring out the colors even more.
Ethiopian Opal Gem Rough Specimen, 14.71 carats
	This unique item is sold. Item: opal101-ethiopian-opal-rough This genuine Ethiopian opal rough weighs 14.71 carats 0.85" x 0.6" x 0.55" thick (21.5mm x 15mm x 14mm) Mined in Ethiopia Price: $147.10 This unique piece of genuine Ethiopian opal gem rough is completely natural just as it was found in the earth! Within the opal there are areas with beautiful green, red, yellow and orange broad flashes of color as you turn it. This lapidary grade opal specimen makes a great mineral specimen of natural Ethiopian opal just as it is. This precious opal rough specimen could also be set into jewelry just as it is to make a wonderful Ethiopian opal jewelry item as well. This genuine Ethiopian opal rough specimen has not been heated or treated in any way. There is some matrix and internal cracks & inclusions inside with a large completely clean area and some smaller clean areas that could be cut into 3 carats of completely clean fine quality Ethiopian opal gemstones! See also an opposite side view.
Ethiopian Opal Gem Rough Specimen, 24.52 carats
	Item: opal104-ethiopian-opal-rough this genuine Ethiopian opal rough weighs 24.52 carats 1.1" x 1" x 0.55" thick (28mm x 25.5mm x 14mm) mined in Ethiopia Price: $148.08 This unique piece of genuine Ethiopian opal gem rough is completely natural, just as it was found in the earth! Within the opal there is very beautiful color-play in flashes of green, yellow, red and orange colors as you turn it. The photo at left was taken under incandescent light. It shows an area with a fresh surface break which nicely reveals the color-play inside. The remaining surfaces are mostly covered with a very thin layer of rough opaque opal. This untreated opal specimen makes a great mineral specimen of natural Ethiopian opal just as it is. This precious opal rough specimen could also be set into jewelry just as it is to make a wonderful Ethiopian opal jewelry item as well. There is a little matrix on some surfaces, and there are several large internal cracks inside separating some small but completely clean areas that could be cut into completely clean Ethiopian opal gemstones weighing from 1/2 to one carat each with good color-play. See also a side view photo.
Ethiopian Opal Gem Rough Specimen, 12.56 carats
	Item: opal102-ethiopian-opal-rough this genuine Ethiopian opal rough weighs 12.56 carats 0.8" x 0.6" x 0.4" thick (20mm x 15mm x 10mm) mined in Ethiopia Price: $198.00 This unique piece of untreated Ethiopian opal rough is completely natural just as it was found in the earth. Along one side there is a layer of very high grade opal with beautiful green, red, yellow and orange broad flashes of 100% natural colors. This lapidary grade opal layer would yield a single completely clean fine quality cabochon gem weighing over 4 carats. This genuine Ethiopian opal rough specimen has not been heated or treated in any way. The photo at left nicely shows the high grade opal layer along one side which makes up about 35% of the piece, and the milky opal layer with little to no color-play along the opposite side making up the remaining 65%. There is a very small amount of attached matrix. See also an opposite side view.
Ethiopian Opal Gem Rough Specimen, 11.70 carats
	Item: opal106-ethiopian-opal-rough This genuine Ethiopian opal rough weighs 11.70 carats 0.8" x 0.7" x 0.4" thick (20mm x 18.5mm x 10mm) Mined in Ethiopia Price: $175.50 This untreated specimen of Ethiopian opal is completely natural, just as it was found in the earth. Over 90% of this high quality opal rough is completely clean inside, and the opal is transparent. Under incandescent light or sunlight it shows beautiful flashes of green, yellow and blue 100% natural colors here and there within its depths. Under less strong lighting, the colors are more subtle. These colors change as the light moves or as the piece is turned. This rare quality lapidary grade precious opal specimen would yield a single completely clean Ethiopian opal cabochon gem weighing 3.5 carats, or a completely clean free-form gem carving weighing even more. The photo at left shows a fresh surface break on one side which nicely shows the internal color-play under incandescent light. This beautiful precious opal specimen could be set in jewelry just as it is! There a small amount of matrix on some surfaces. See also a side photo.
Ethiopian Opal Gem Rough Specimen, 14.75 carats
	Item: opal105-ethiopian-opal-rough this genuine Ethiopian opal rough weighs 14.75 carats 1.2" x 0.4" x 0.4" thick (30mm x 11mm x 10mm) mined in Ethiopia Price: $222.00 This untreated Ethiopian opal rough specimen is completely natural, just as it was found in the earth. It is completely clean inside and the opal is transparent with no flaws. Under incandescent light or sunlight it shows beautiful flashes of green, yellow and blue 100% natural colors here and there within its depths. Under less strong lighting, the colors are more subtle. These colors change as the light moves or as the piece is turned. This fine lapidary grade precious opal specimen would yield a single completely clean Ethiopian opal cabochon gem weighing over 5 carats, or a wonderful completely clean free-form gem carving weighing even more! The photo at left was taken under incandescent light. It shows a fresh surface break which nicely reveals the color-play inside. The remaining surfaces are mostly covered with a very thin layer of rough opaque opal. There a small amount of matrix on some surfaces. See also a back side photo.
Ethiopian Opal Gem Rough Specimen, 21.11 carats
	Item: opal107-ethiopian-opal-rough this genuine Ethiopian opal rough weighs 21.11 carats 1.25" x 0.8" x 0.5" thick (31mm x 19mm x 12.5mm) mined in Ethiopia Price: $264.38 This untreated Ethiopian opal rough specimen is completely natural - just as it was found in the earth. The opal has no flaws inside, and in the upper part it has very fine color-play showing beautiful flashes of green, red, and orange natural colors. These colors change as the light moves or as the piece is turned. The lower part of the opal also shows some color-play when viewed under brighter lights. The photo at left was taken under incandescent light. It shows a fresh surface break which nicely reveals the color-play inside. The remaining surfaces are mostly covered with a very thin layer of opaque opal. This lapidary grade precious opal specimen would yield a single completely clean Ethiopian opal cabochon gem weighing 4.5 carats from the very high quality area in the upper part of the opal. This untreated Ethiopian opal specimen would look very nice if set into jewelry just as it is! There a small amount of matrix on the opposite side. See also a side view photo, and a back view photo.
Ethiopian Opal Gem Rough Specimen, 157.1 carats
	Item: opal109-ethiopian-opal-rough this genuine Ethiopian opal rough weighs 157.1 carats 1.5" x 1.3" x 1.1" (38mm x 33mm x 28mm) mined in Ethiopia Price: $1885.20 This amazing specimen of untreated Ethiopian opal rough specimen is completely natural - just as it was found in the earth! This rare quality precious opal specimen has no cracks, and there is a very large flawless area inside weighing over 100 carats with fine color-play showing beautiful flashes of green, red, yellow, and orange natural colors. These wonderful colors change as the light moves or as the piece is turned. The photo at left was taken under incandescent light. It shows a fresh surface break which very nicely reveals the color-play inside. See also another view. Most of the remaining surfaces are covered with a thin layer of opaque opal and matrix. See also a side view photo, and a back view photo. This lapidary grade precious opal specimen makes a wonderful mineral specimen just as it is, although it would yield over 50 carats of completely clean Ethiopian opal cabochon gems with fine color-play! This untreated Ethiopian opal specimen is a spectacular natural opal mineral specimen!
Ethiopian Opal Gem Rough Specimen, 34.0 carats
	Item: opal108-ethiopian-opal-rough this genuine Ethiopian opal rough weighs 34.0 carats 1.1" x 0.8" x 0.8" thick (28mm x 20mm x 20mm) mined in Ethiopia Price: $544.00 This untreated Ethiopian opal rough specimen is completely natural - just as it was found in the earth. There is a large clean area inside weighing over 20 carats with no flaws and with fine color-play showing beautiful flashes of green, red, yellow, and orange natural colors. These colors change as the light moves or as the piece is turned. The photo at left was taken under incandescent light. It shows a fresh surface break which nicely reveals the color-play inside. Most of the remaining surfaces are covered with a very thin layer of opaque opal. This lapidary grade precious opal specimen makes a wonderful mineral specimen just as it is, although it would yield 10-15 carats of completely clean Ethiopian opal cabochon gems with beautiful color-play. This untreated Ethiopian opal specimen would also look very nice if set into jewelry just as it is! There a small amount of matrix on the opposite side. See also a side view photo, and a back view photo.

This is the end of our page for Opal Mineral Specimens (boulder opal specimens and other natural opals).

See also our page displaying genuine opal jewelry designs including natural jelly opal jewelry and jelly opal necklaces set with 100% natural Ethiopian opal gemstones!

To see more opal photos, just select another item category from the table below. To see photos of another mineral variety, select any item category link in our Mineral Inventory & Factsheet Index.

Additional Opal Items in our Virtual Gallery

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	Opal Mineral Specimens and Opal Lapidary Rough	Opal Spheres	Ethiopian Opal Gem Rough Specimens	Opal Gems	Genuine Opal Jewelry: (opal pendants, opal rings, opal earrings and opal necklaces) Boulder Opal Jewelry Welo Opal Jewelry Mexican Fire Opal Jewelry Precious Opal Jewelry Ethiopian Opal Jewelry and other Natural Opal Jewelry Designs

Would you like us to inform you when we add more natural boulder opal specimens, white precious opal specimens, and fire opal specimens, and common opal specimens on this page?
We do have additional opal specimens in stock at our mineral warehouses, so be sure to let us know if you have any special requests. Please contact our webmaster or our 'site' geologist with any questions or comments.