Fibrolite Sillimanite 4.88 Cts Natural Sri Lanka Loose Gemstone 20996
| Product Code: | 20996 |
| Availability: | In Stock |
-
$240.00
| Carats | 4.88 |
| Size | 12.06 x 8.1 mm |
| Color | White |
| Clarity | VC |
| Shape | Cushion |
| Treatment | None |
| Origin | Sri Lanka |
| Location | Colombo, Sri Lanka |
| Price | $ 240.00 |
100% Natural - Not treated in any way.
Rare Collectors Gem
Will make a Gorgeous Ring or Pendent accented with Diamonds.
Clean Gems are rare.
Gem with High Lustre and Good Clarity.
Large Sizes are Extremely Rare!
A Gem of Lasting Beauty.
Among the Rarest of gemstones.
Formula :A variety or type of: Sillimanite
Hardness 6
Specific Gravity 3.14 to 3.25
Refractive Index 1.658 1.678
Pleochroism Distinct
Colour Blue, Brown, Colourless, Green, Grey
Lustre Vitreous
Formula:A12(Si04)O
Named in 1802 by Jacques Louis Comte de Bournon because of its Fibrous habit.Although fibrolite has priority over sillimanite, the Two species were not ultimately recognized as the same species Until about 1854 by james Dwight Dana.Despite Dana’s adherence To issues of priority, the concept of polymorphism took many years Took many years to be fully adopted.First Recorded Locality:! Carnatic Coast (Karnatak), Tamil Nadu,India.
Fibrolite is a fibrous from of Sillimanite.This name is because the Mineral appears like a bunch of fibres. twisted together when viewed in thin section oor even by the naked eye.
Rare Collectors Gem
Will make a Gorgeous Ring or Pendent accented with Diamonds.
Clean Gems are rare.
Gem with High Lustre and Good Clarity.
Large Sizes are Extremely Rare!
A Gem of Lasting Beauty.
Among the Rarest of gemstones.
Formula :A variety or type of: Sillimanite
Hardness 6
Specific Gravity 3.14 to 3.25
Refractive Index 1.658 1.678
Pleochroism Distinct
Colour Blue, Brown, Colourless, Green, Grey
Lustre Vitreous
Formula:A12(Si04)O
Named in 1802 by Jacques Louis Comte de Bournon because of its Fibrous habit.Although fibrolite has priority over sillimanite, the Two species were not ultimately recognized as the same species Until about 1854 by james Dwight Dana.Despite Dana’s adherence To issues of priority, the concept of polymorphism took many years Took many years to be fully adopted.First Recorded Locality:! Carnatic Coast (Karnatak), Tamil Nadu,India.
Fibrolite is a fibrous from of Sillimanite.This name is because the Mineral appears like a bunch of fibres. twisted together when viewed in thin section oor even by the naked eye.
