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Sillimanite
Sillimanite is a high temperature and high pressure aluminum silicate found in high-grade regional metamorphic rocks. Transparent crystals are called "fibrolite" by gemologists. This is a gemmy, fine, lavender, elongate crystal with a bit of rounding. The edge rounding likely represents resorption into the matrix more than stream wear. This example from Mogok, Burma is sharper than most. 7.22 carats.
Unknown Owner
Product details
Species
SizeThumbnail
Dimensions1.8 x 0.9 x 0.4 cm
Locality
Added on10/23/2024
Comments
Known provenance
2024/08
Unknown Owner
Not disclosed—Species and Locality Wiki Pages
Collectors of Sillimanite from Mogok Valley
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