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Mica has a monoclinic crystal system and peels into sheets
Crocidolite is altered to iron oxides and then replaced by silica
75 L x 1 W x 2
Amethyst is a purple variety of quartz that gets its color from irradiation and inclusions of iron in the crystal lattice
and fluorescence make calcite a desirable mineral to collect
Pyrite with Minerals - B smokey quartz Mica has a monoclinic crystalPyrite (Healer's gold) is composed of pyrite and magnetite. Pyrite is an iron sulfide mineral nicknamed "fool's gold" for its superficial resemblance to gold. You will receive the exact item as pictured. Dimensions: 3. 0 L X 2. 0 W X 1. 5 H inches Weight: 0. 43 pounds
