Description
Biotite mica specimens.
Size 20mm X 5-10mm thick
Specimen shown is representative only
Mica (biotite)
$5.50 inc GST
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.
mohs – 2.5 – 3.
Out of stock
