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

Item: Natural Opal Specimens
	Code#: opam156x Size: available in several small sizes (please see below) Location: 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.
Item: 1.75 inch Natural Opal Specimens	1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 18
Code#: opam156b Price: $3.00
Item: 2.5 inch Natural Opal Specimens	1 2 3 4 5 6 7 8 9 10 11 12
Code#: opam156d Price: $6.25
Item: 3 inch Natural Opal Specimens	1 2 3 4 5 6 7 8 9 10 11 12
Code#: opam156e Price: $11.50
Item: Boulder Opal Mineral Specimen
	Code#: opam155 Weight: 0.2 Lbs Size: 2" x 1.7" x 1.4" ( 52 x 44 x 35mm) Location: 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.
Item: Boulder Opal Mineral Specimen
	Code#: opam147 Weight: 0.6 Lbs Size: 2.9" x 2.9" x 2.2" ( 74 x 74 x 55mm) Location: 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. Within the opal there are areas with intense flashes of blue-purple and blue-green colors. This mineral specimen is completely natural boulder opal, with no dyes, glues, laminations or fillers.
Item: Boulder Opal Mineral Specimen
	This unique item is sold. Code#: opam148 Weight: 0.5 Lbs Size: 3.3" x 2.6" x 1.9" ( 84 x 66 x 48mm) Location: mined in Queensland, Australia Price: $112.50 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 flashes of orange-red and bright green colors. This mineral specimen is completely natural boulder opal, with no dyes, glues, laminations or fillers.
Item: Boulder Opal Mineral Specimen
	This unique item is sold. Code#: opam149 Size: 4.1" x 2.6" x 1.5" ( 105 x 65 x 37mm) Location: mined in Queensland, Australia Price: $114.50 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 flashes of bright green colors and rich blue-violet colors. 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.
Item: Boulder Opal Mineral Specimen
	Code#: opam152 Weight: 0.9 Lbs Size: 4.7" x 2.3" x 1.9" ( 119 x 58 x 47mm) Location: mined in Queensland, Australia Price: $134.50 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 flashes of blue, purple and green colors. 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 and a back-view photo.
Item: Boulder Opal Mineral Specimen
	Code#: opam150 Weight: 2.9 Lbs Size: 5.8" x 5" x 4.5" ( 148 x 126 x 114mm) Location: mined in Queensland, Australia Price: $238.00 This large piece of 100% natural boulder opal rough weighs 2.9 pounds. It has brown ironstone matrix with a thin surface layer of precious opal. Within the opal there are areas with intense flashes of blue, purple and green colors. 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.
Item: Boulder Opal Mineral Specimen
	Code#: opam144 Size: 2.6" x 2.2" x 1.5" ( 67 x 57 x 37mm ) Location: mined in Queensland, Australia Price: $122.50 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.
Item: Boulder Opal Mineral Specimen
	Code#: opam145 Size: 3.8" x 1.5" x 1.1" ( 98.5 x 39 x 28mm ) Location: mined in Queensland, Australia Price: $194.50 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 thasn 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.
Item: Boulder Opal Gemstone, 10.56 carats
	Code#: opag133 Weight: this genuine boulder opal gem weighs 10.56 carats Size: 0.7 x 0.6 x 0.2 thick (17mm x 14mm x 6mm) Price: $78.50 This unique boulder opal gemstone was ground & polished into a free-form cabochon shape from natural boulder opal rough that was mined in Australia. Other than being polished, 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, red and blue flashes as you turn it. This boulder opal gem makes a great specimen of natural Australian boulder opal just as it is, although it would make a wonderful boulder opal pendant as well.
Item: Boulder Opal Gemstone, 21.12 carats
	Code#: opag134 Weight: this genuine boulder opal gem weighs 21.12 carats Size: 1.5 x 0.5 x 0.2 thick (38mm x 12mm x 6mm) Price: $81.50 This unique boulder opal gemstone was ground & polished into a free-form cabochon shape from natural boulder opal rough that was mined in Australia. Other than being polished, 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 green, red and blue flashes 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 pendant as well.
Item: Boulder Opal Gemstone, 57.35 carats
	Code#: opag135 Weight: this genuine boulder opal gem weighs 57.35 carats Size: 1.4 x 0.8 x 0.4 thick (36mm x 20mm x 10mm) Price: $84.50 This unique boulder opal gemstone was ground & polished into a free-form cabochon shape from natural boulder opal rough that was mined in Australia. Other than being polished 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 flashes 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 item as well.
Item: Boulder Opal Gemstone, 97.14 carats
	This unique item is sold. Code#: opag136 Weight: this genuine boulder opal gem weighs 97.14 carats Size: 1.5 x 1.1 x 0.5 thick (37mm x 28mm x 12mm) Price: $84.50 This unique boulder opal gemstone was ground & polished into a free-form cabochon shape from natural boulder opal rough that was mined in Australia. Other than being polished, 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 purple-blue flashes 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 pendant as well.
Item: Boulder Opal Gemstone, 32.75 carats
	Code#: opag137 Weight: this genuine boulder opal gem weighs 32.75 carats Size: 1.3 x 0.7 x 0.3 thick (34mm x 18mm x 7mm) Price: $118.50 This unique boulder opal gemstone was ground & polished into a free-form cabochon shape from natural boulder opal rough that was mined in Australia. Other than being polished 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, blue-purple and red flashes 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 pendant as well.
Item: Boulder Opal Gemstone, 41.06 carats
	Code#: opag138 Weight: this genuine boulder opal gem weighs 41.06 carats Size: 1.1 x 0.9 x 0.3 thick (29mm x 24mm x 8mm) Price: $132.50 This unique boulder opal gemstone was ground & polished into a free-form cabochon shape from natural boulder opal rough that was mined in Australia. Other than being polished, 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 intense and beautiful 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 this genuine boulder opal gem would make a wonderful boulder opal pendant as well.
Item: Boulder Opal Gemstone, 131.85carats
	Code#: opag139 Weight: this genuine boulder opal gem weighs 131.85 carats Size: 1.9 x 1.3 x 0.4 thick (47mm x 32mm x 11mm) Price: $168.50 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 opal jewelry design as well. See also a full-view photo.
Item: Boulder Opal Gemstone, 75.73 carats
	Code#: opag140 Weight: this genuine boulder opal gem weighs carats75.73 Size: 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.
Item: Boulder Opal Gemstone, 134.28carats
	Code#: opag141 Weight: this genuine boulder opal gem weighs carats134.28 Size: 1.7 x 1.3 x 0.5 thick (43mm x 33mm x 12mm) Price: $214.50 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, blue-purple, yellow, and red flashes 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 pendant as well.
Item: Boulder Opal Gemstone, 197.42 carats
	Code#: opag142 Weight: this genuine boulder opal gem weighs 197.42 carats Size: 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.
Item: Precious Opal Shell Fossil
	Code#: opag132 Weight: 43.25 carats Size: 34 X 30 X 11 mm Location: 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.

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.

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

OPAL	Select any unfollowed link to see more opal photos
	Opal Mineral Specimens	Opal Spheres	Opal Gems	Genuine Opal Jewelry: (opal pendants, opal rings, and opal necklaces) Boulder Opal Jewelry Mexican Fire Opal Jewelry and Precious Opal Jewelry

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.