Biotite Mica Mineral Specimens

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.

Code: 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.

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.

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.

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: $375.00
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.

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: $575.00
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.

This unique item is sold.

Code: biom110
7.6" x 4.7" x 0.4"
(19.3cm x 11.9cm x 1.0cm)
Itinga, Brazil
Price: $22.50
This biotite mica specimen was discovered in a pegmatite at Itinga, Brazil.

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.