***AKM - 14.66CT RUBY RED OCTAGON SILLIMANITE / FIBROLITE SRI-LANKA***

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R50.00

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Seller

AllanKuhnelArt&Goods34

97.22 % Positive ratings

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Condition

New

Location

South Africa

Carats

More than 10

Cut

Undefined

Colour

Red

Customer ratings:

1 ratings

Bob Shop ID

444348698

***AKM - 14.66CT RUBY RED OCTAGON SILLIMANITE/FIBROLITE SRI-LANKA***100% GENUINE POROUS SILLIMANITE.VERY DURABLE.GOOD FOR EVERYDAY WEARING.

WEIGHT: 3.2GRAMS
CT: 14.66CT
CUT: OCTAGON
SIZE: 17.60MM X 13.20MM X 7.96MM
HARDNESS: 6-7.5 MOH'S
TREATMENTS: HEAT, DYED
THIS SILLIMANITE STONE SET IN GOLD OR SILVER WILL MAKE A BEAUTIFUL FOCAL POINT, PIECE OF HARD WEARING JEWELLERY.

SO WHAT IS SILLIMANITE REALLY?

Blue Kyanite Crystal

It is a mineral also known as "fibrolite" and is named after Benjamin Silliman (1779-1864). It is a member of the aluminosilicate series, which also includes Andalusite and Kyanite!"Fibrous sillimanite is very often dyed to imitate various "precious" gemstones like ruby, emerald and others. This type of sillimanite has a massive fibrous like appearance under magnification and show color concentrations...Such dyed sillimanite is now very often encountered in India."

It would seem now that the vast MAJORITY of so-called "emeralds", "rubies" and "sapphires" from India are in fact dyed Sillimanite. The big giveaway is that these stones are highly fibrous, and opaque, as you can see in the "ruby" above.

Sillimanite can naturally be found in the colors Sapphire blue, blue-green, colorless, white, gray, yellowish, brownish, greenish, bluish, violet-blue. It can be transparent to highly fibrous.

Mohs hardness of 6 to 7.5

https://invoguejewelry.blogspot.com › 2014/01