Mineral Species: Apophyllite

Chemical Formula: KCaSi8O20(F,OH).8H2O

Chemical Name: Potassium Calcium Silicate

Mineral Class: Sheet Silicate

Mineral Notes: The name of the mineral means "to leaf apart" in Greek. It was given because crystals tend to peel or flake apart when heated due to the loss of water.

Description: A specimen notable for the regularity of its cubic crystals. All are of nearly identical size and many are twinned. The transparency is excellent, showing the interior and often other crystals beneath.

Location: Dahisar, India.