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Dominant species
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Orpiment
Chemical
Formula
As2S3
Species
Sulfides
Crystal
System
Monoclinic
Mohs
Scale
1-2
Specific
Gravity
3.49
Color
Lemon-yellow to golden or brownish yellow
Streak
Pale lemon-yellow
Luster
Pearly
Refractive
Index
n = 2.400 n = 2.810 n = 3.020
Diaphaneity
Transparent
Cleavage
PerfectPerfect imperfect
Crystal Habit:Commonly in foliated columnar or fibrous aggregates; may be reniform or botryoidal; also granular or powdery; rarely as prismatic crystals
Orpiment8533
Orpiment8533
Orpiment8532
Orpiment8532
Orpiment8531
Orpiment8531
Orpiment8530
Orpiment8530
Orpiment8529
Orpiment8529
Orpiment8528
Orpiment8528
Orpiment8527
Orpiment8527
Orpiment8526
Orpiment8526
Orpiment8525
Orpiment8525
Orpiment8524
Orpiment8524
Orpiment8523
Orpiment8523
Orpiment8522
Orpiment8522
Orpiment8521
Orpiment8521
Orpiment8520
Orpiment8520
Orpiment8519
Orpiment8519
Orpiment8518
Orpiment8518
Orpiment8517
Orpiment8517
Orpiment8516
Orpiment8516
Orpiment8515
Orpiment8515
Orpiment8514
Orpiment8514
Orpiment8513
Orpiment8513
Orpiment8512
Orpiment8512
Orpiment8511
Orpiment8511
Orpiment8510
Orpiment8510
Orpiment8509
Orpiment8509
Orpiment8508
Orpiment8508
Orpiment8507
Orpiment8507
Orpiment8506
Orpiment8506
Orpiment8505
Orpiment8505
Orpiment8504
Orpiment8504
Orpiment8503
Orpiment8503

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