Apophyllite (Fluoro-apophyllite), colourless faceted, India. 2.79 carats.

An Apophyllite gemstone from Jalgoan, India.

Also known as Fluoro-Apophyllite, this gem variety is distinguished from other members of the Apophyllite family by its high Fluorine content and forms as orthorhombic crystals.

Its low hardness, 4.00-4.50 on Moh's scale, its brittle tendency and its perfect cleavage mean that faceted gems are rarely seen.

weight:  2.79 carats
shape:   Square step cut
dimensions:   9.11 x 9.02 x 6.56 mm
treatment:  None