Additional Biotite Items in our Virtual Gallery

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Biotite Decorator Mineral Specimens
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Almandine Garnets in Biotite-Sillimanite Schist

This unique item is sold.
Item: almm163_garnet-mineral-specimen
Natural garnet in matrix mineral specimen weighing 6.6 lbs
This almandine garnet mineral specimen measures 6.1" x 5.8" x 3.9"
(156 x 147 x 98mm)
Mined at Itabira, Brazil
Price: $112.50
This large size decorator mineral specimen has a matrix composed of black biotite mica intergrown with long blade-like chatoyant sillimanite and a small amount of cordierite (iolite). There are several large reddish-purple almandine garnets (also known as almandite) exposed on its surfaces, each garnet measures from 1.5 to 2 inches across! The garnet crystals are fractured and they are translucent to semi-transparent.
 

Garnet in Biotite-Sillimanite Schist, 43.9 pounds


Item: almm155_garnet-mineral-specimen
Natural garnet in matrix mineral specimen weighing 43.9 lbs!
This almandine garnet mineral specimen measures 14" x 11" x 6"
Mined near Itabira, Brazil
Price: $562.25
This large size decorator mineral specimen has a matrix composed of black biotite mica intergrown with long blade-like chatoyant sillimanite. There are several large reddish-purple almandine garnets (also known as almandite) exposed on its surfaces, each garnet measures from 2 inches to 3 inches across! The garnets are fractured and they are translucent to semi-transparent. There is about 30% chatoyant sillimanite intergrown with the biotite mica matrix, and there also is a small amount of blue iolite as well. The photo at left was taken under daylight, see also a back-view photo of this large almandine garnet decorator mineral specimen.
 

7.6 Lb Biotite, Sillimanite & Garnet Sphere

This unique item is sold.
Item: bios102
7.6 Lbs (3.5kg)
5" diameter (126mm)
Price: $312.25
This unusual sphere was ground and polished in the U.S.A. It consists mainly of black biotite mica and dark brown chatoyant sillimanite, and it also has a purple-red almandine garnet measuring over 2.5" exposed on the sphere's surface. The rough material that this sphere was made from was mined near Itabira in Minas Gerais, Brazil. This is a great decorator or collector sphere.
 


We also carry an assortment of stands for small & medium sized spheres and minerals.

This is the end of our Biotite Decorator Mineral Specimens page.
To see more biotite 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 Biotite Item Categories in our Virtual Gallery
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Biotite
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Biotite
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Biotite
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We do have more large decorator size biotite mineral 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.

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Last Updated: March 27, 2015
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