Mica is a distinctive and common mineral which is used extensively in industry around the world. It can also be found as a silvery inclusion within other minerals an example of which is seraphinite. Traces of mica have been found in cave paintings dating back 40,000 to 10,000 years BC.
Part of a larger group known as silicate minerals or sheet silicates because it forms in distinctive layers, mica is relatively soft, flaky and light weight and both sheets and flakes are flexible. It's heat-resistant and doesn't conduct electricity and there are 37 different varieties of mica the most common of which includes muscovite and lepidolite.
The lustre of this piece of mica would best be described as being vitreous. Lustre is used to describe the sheen of a mineral's surface or the way that it interacts with the light. A mineral with a vitreous lustre will either have a glassy appearance or it may also be shiny or glossy.
Weight (grams): 88
Size (cms): 7.1 x 5.8 x 1.3