Colour : Light Green
Shape : Cushion
Weight : 13.66 Cts
Dimension : 18.0 x 11.9 x 7.1 mm
Treatment : Unheated
Variety: Natural Sillimanite – Fibrolite
Origin : Sri Lanka 🇱🇰
• CSL – Colored Stone Laboratory Certified
( GIA Alumina Association Member )
Sillimanite is an aluminosilicate mineral with the chemical formula Al2SiO5. Sillimanite is named after the American chemist Benjamin Silliman (1779–1864). It was first described in 1824 for an occurrence in Chester, Middlesex County, Connecticut, US.
It is Orthorhombic crystal system mineral with 7 hardness according to Mohs hardness scale.
Mostly, It is found in colors such as colorless or white to grey, also brown, yellow, yellow-green, grey-green, blue-green and blue. Sometimes It has Sub Adamantine Luster.
It can be found in mainly Sri Lanka and Burma also, Japan, India, France, USA, Prutugal, Poland, Spain, Kenya.