Sulfates and Phosphates
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Barite (Barite Group)
BaSO4; heavy, sea-shell stacking
Barite Group
Barite, Celestite, Anglesite, Anhydrite
Apatite (Phosphate)
Ca5(PO4)3(F,Cl,OH); prismatic habit, turquoise, yellow
Gypsum (Sulfate)
CaSO4 * 2H2O; selenite, white (like halite)
Anhydrite (Barite Group)
CaSO4; glassy, green-gray
Antlerite (Sulfate)
Cu3(SO4)(OH)4
Anglesite (Barite Group)
PbSO4
Celestite (Barite Group)
SrSO4; prismatic habit (sword), blue, gray
