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chalcanthite
Science; General science
A mineral with the chemical composition CuSO 4 · 5H 2 O. Chalcanthite commonly occurs in blue to greenish-blue triclinic crystals or in massive fibrous veins or stalactites (see ...
epsomite
Science; General science
A mineral with the chemical composition MgSO 4 · 7H 2 O. Epsomite, or epsom salt, occurs in clear, needlelike, orthorhombic crystals. More commonly it is massive or fibrous, ...
huebnerite
Science; General science
A mineral with the chemical composition MnWO 4 . Huebnerite is the manganese member of the wolframite solid-solution series. It commonly contains small amounts of iron. It ...
crocoite
Science; General science
A mineral with the chemical composition PbCrO 4 . Crocoite occurs in yellow to orange or hyacinth red, monoclinic, prismatic crystals with adamantine to vitreous luster (see ...
anglesite
Science; General science
A mineral with the chemical composition PbSO 4 . Anglesite occurs in white or gray, orthorhombic, tabular or prismatic crystals or compact masses (see illus. ). It is a common ...
celestite
Science; General science
A mineral with the chemical composition SrSO 4 . Celestite occurs commonly in colorless to sky-blue, orthorhombic, tabular crystals. Fracture is uneven and luster is vitreous. ...
zircon
Science; General science
A mineral with the idealized composition ZrSiO 4 , one of the chief sources of the element zirconium. Trace amounts of uranium and of thorium are often present and the mineral ...
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