Formula: PbWO4
Origin of name: for J. Stolz, Czech Republic
Crystal system: tetragonal
Crystal class: 4/m
Twinning:
Unit cell: a = 5.462 Å, c = 12.05 Å
Colour: yellowish gray, tan to brown, reddish brown, yellowish red to red
Diaphaneity:
Luster: subadamantine, resinous
Habit: crystals dipyramidal, thick tabular, rarely prismatic, faces striated
Hardness: 2.5 to 3
Specific gravity: 7.9 to 8.34
Cleavage: 2; {001} imperfect, {011} indistinct
Tenacity: conchoidal to uneven, brittle
Streak: colourless
Synonyms/varieties:
Comments: dimorphous with raspite
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