Types of Garnet Minerals
8
Coin
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This model summarizes the types of garnet group minerals, in which the aluminum garnet is usually red, and the calcium member is usually green. General formula: X, Y (SiO)
X² = Mg², Ca², Fe², Mn², etc.
Y³ = Al³, Fe³, Cr³, V³, etc.
PyrAlSpites: aluminum garnet (Pyrope, Almandine, Spessartine) aluminum at the Y³. UGrAndites: Calcium at the X² locus of calcium garnet.
