Sillimanite Chatoyant Mineral Specimens with Natural Silky Sheen
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Sillimanite Mineral Specimens with Natural Chatoyant Cat's Eye

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Almandine Garnet in Biotite-Sillimanite Schist Matrix


Code: almm202
Natural garnet in matrix specimen weighing 2.1 lbs
Size: 6.2" x 5.4" x 1.8"
Mined at Itabira, Brazil
Price: $81.50
This natural mineral specimen has sillimanite-biotite schist matrix with large reddish-purple almandine garnets (also known as almandite). The matrix consists mostly of black biotite with occasional long radiating formations of blade-like chatoyant sillimanite. There is a 1.5 inch garnet exposed on the opposite side as well. See also an opposite side view of this unique garnet in matrix mineral specimen.
Almandine Garnet in Matrix


Code: almm204
Natural garnet in matrix specimen weighing 4.0 lbs
Size: 7.5" x 4" x 3"
Mined at Itabira, Brazil
Price: $112.50
This natural decorator mineral specimen has almandine garnet in a matrix of sillimanite and biotite with a small amount of iolite.
Almandine Garnet with Biotite, Iolite and Sillimanite


Code: almm203
Natural garnet in matrix specimen weighing 4.2 lbs
Size: 9.5" x 4.6" x 1.8"
Mined at Itabira, Brazil
Price: $116.50
This natural mineral specimen has almandine garnets in sillimanite-biotite schist matrix with iolite. There are garnets exposed on the opposite side as well. See also an opposite side view of this unique garnet in matrix mineral specimen.
Large Garnet in Matrix Decorator Specimen


Code: almm205
Natural garnet in biotite-silllimanite schist matrix weighing 15.0 Lbs
Garnet in Matrix Dimensions: 10.7" x 6" x 5.5"
Mined at Itabira, Brazil
Price: $395.00
This large decorator mineral specimen has a matrix composed of black biotite mica intergrown with long radiating formations of blade-like chatoyant sillimanite. There are large reddish-purple almandine garnets (also known as almandite) exposed on its surfaces. The garnets are fractured and they are translucent to semi-transparent with deep red-purple natural color. See an opposite side view of this unique garnet in matrix decorator specimen.
Large Garnet in Matrix Decorator Specimen


Code: almm201
Natural garnet in biotite-silllimanite schist matrix weighing 23.1 Lbs
Garnet in Matrix Dimensions: : 11.3" x 7" x 6.5"
Mined at Itabira, Brazil
Price: $595.00
This large size decorator mineral specimen has a matrix composed of black biotite mica intergrown with long radiating formations of blade-like chatoyant sillimanite. There are over 80 large reddish-purple almandine garnets (also known as almandite) exposed on its surfaces! The garnets are fractured and they are translucent to semi-transparent. See a full view photo of this unique garnet in matrix decorator specimen. See also a back-view photo of this large garnet in matrix decorator mineral specimen.
Chatoyant Sillimanite Specimen

This unique item is sold.
Code: silm113
Sillimanite Dimensions: 3.2" x 2.2" x 0.35"
Mined in Minas Gerais, Brazil
Price: $16.95
This natural sillimanite specimen has a thin flat shape. It was discovered within ancient river gravels in Minas Gerias, Brazil. Its surfaces were worn smooth from the natural action of the ancient river, and there are several areas on its surface with faint silky chatoyancy as the specimen is turned. This completely natural cat's eye sillimanite piece makes a very nice specimen just as it is, or it could also be used as lapidary rough.
Chatoyant Sillimanite Specimen

This unique item is sold.
Code: silm115
Sillimanite Dimensions: 4.1" x 2.8" x 0.7"
Mined in Minas Gerais, Brazil
Price: $34.95
This natural sillimanite specimen was discovered within ancient river gravels in Minas Gerias, Brazil. Its surfaces were worn smooth from the natural action of the ancient river, and there are several areas on its surface with faint silky chatoyancy. This completely natural chatoyant sillimanite piece makes a very nice specimen just as it is, or it could also be used as lapidary rough.
Chatoyant Sillimanite Specimen

This unique item is sold.
Code: silm116
Sillimanite Dimensions: 4.7" x 2.7" x 1.3"
Mined in Minas Gerais, Brazil
Price: $38.95
This natural sillimanite specimen was discovered within ancient river gravels in Minas Gerias, Brazil. Its surfaces were worn smooth from the natural action of the ancient river, and there are some small areas on its surface with faint silky chatoyancy that changes colors from light to dark as the specimen is turned.
Chatoyant Sillimanite Specimen

This unique item is sold.
Code: silm117
Natural sillimanite specimen weighs 1.2 Lbs
Sillimanite Dimensions: 4.3" x 2.5" x 2.1"
Mined in Minas Gerais, Brazil
Price: $48.95
This natural sillimanite specimen was discovered within ancient river gravels in Minas Gerias, Brazil. Its surfaces were worn smooth from the natural action of the ancient river, and there are some small areas on its surface with faint silky chatoyancy that changes colors from light to dark as the specimen is turned.
Chatoyant Sillimanite Specimen

This unique item is sold.
Code: silm118
Natural sillimanite specimen weighs 2 Lbs
Sillimanite Dimensions: 5.3" x 4.3" x 2.3"
Mined in Minas Gerais, Brazil
Price: $82.50
This natural sillimanite specimen was discovered within ancient river gravels in Minas Gerias, Brazil. Its surfaces were worn smooth from the natural action of the ancient river, and there are some small areas on its surface with faint silky chatoyancy that changes colors from light to dark as the specimen is turned.
 
Almandine Garnets in Biotite-Sillimanite Matrix

This unique item is sold.
Item: almm167
Natural red garnet in matrix specimen weighing 1.3 lbs
Garnet in Matrix Dimensions: : 4.5" x 2.6" x 1.7"
Mined at Itabira, Brazil
Price: $46.95
This natural mineral specimen has large reddish-purple almandine garnets with chatoyant sillimanite sprays and black biotite along with a small amount of quartz.
 
Almandine Garnets in Biotite-Sillimanite-Quartz Matrix

This unique item is sold.
Item: almm173
Natural color garnet in matrix specimen weighing 3.4 lbs
Garnet in Matrix Specimen Size: 6.4" x 4.2" x 2.9"
Mined at Itabira, Brazil
Price: $74.50
This natural decorator mineral specimen of sillimanite-biotite-quartz matrix has reddish-purple almandine garnet (also known as almandite garnet). The sillimanite is chatoyant with blade-like form.
 
Garnets in Matrix

This unique item is sold.
Item: almm174
Natural color garnet in matrix specimen weighing 4.2 lbs
Garnet in Matrix Specimen Size: 6.5" x 4" x 3.6"
Mined at Itabira, Brazil
Price: $84.50
This unique decorator mineral specimen has a matrix of chatoyant blade-like sillimanite and black biotite with a small amount of quartz along with reddish-purple almandine garnets (also known as almandite garnet).
 
Almandine Garnets in Biotite-Sillimanite Schist


Item: almm152
Natural garnet in matrix specimen weighing 4.0 lbs
Size: 5.6" x 4.7" x 3.5"
(142 x 119 x 90mm)
Mined at Itabira, Brazil
Price: $114.50
This decorator specimen of raw sillimanite-biotite schist matrix has reddish-purple almandine garnet (also known as almandite) with a small amount of blue iolite as well. The matrix consists predominantly of chatoyant sillimanite with long blade-like form.
 
Large Garnet in Matrix Decorator Specimen

This unique item is sold.
Item: almm164
Natural garnet in biotite-silllimanite schist matrix weighing 11.1 Lbs
Garnet in Matrix Dimensions: : 7.5" x 6.5" x 4.5"
Mined at Itabira, Brazil
Price: $168.25
This large size decorator mineral specimen has a matrix composed of black biotite mica intergrown with long radiating formations of blade-like chatoyant sillimanite. There are several large reddish-purple almandine garnets (also known as almandite) exposed on its surfaces. The garnets are fractured and they are translucent to semi-transparent. See also a back-view photo of this large garnet in matrix decorator mineral specimen.
 
43.9 pound Garnet in Biotite-Sillimanite Matrix Decorator Specimen


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: $785.00
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. See a full-view photo of this beautiful garnet in matrix decorator specimen. See also a back-view photo of this large garnet in matrix decorator mineral specimen.
 

This is the end of our Chatoyant Sillimanite Mineral Specimens virtual gallery page.

There are three polymorphs of Al2SiO5: andalusite, kyanite and sillimanite. Each of these minerals has the same chemical composition but differing crystal structure. Be sure to see our natural kyanite crystals as well as our blue kyanite in matrix mineral specimens, and our natural andalusite mineral specimens


To see photos of another mineral variety, select any item category link in our Mineral Inventory & Factsheet Index.

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Last Updated: May 10, 2021
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