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M207 Biotite Mica

M207 Biotite Mica


Here’s a cool new item, a piece of Biotite Mica from Madagascar. It measures 5 1/4″ x 2 3/4″ x 5/8″ thick and has a natural shiny appearance. It even has some iridescent “rainbow” colors when rotated in the light.  A unique specimen to add to your collection.

In stock


Biotite is a name used for a large group of black mica minerals that are commonly found in igneous and metamorphic rocks. These include annite, phlogopite, siderophyllite, fluorophlogopite, fluorannite, eastonite, and many others. These micas vary in chemical composition but are all sheet silicate minerals with very similar physical properties.

Additional information

Weight.75 lbs
Dimensions5.25 × 2.75 × .625 in

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