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Dominant species
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Realgar
Chemical
Formula
As4S4 or AsS
Species
Sulfides
Crystal
System
Monoclinic
Mohs
Scale
1-2
Specific
Gravity
3.56
Color
Red to yellow-orange; in polished section, pale gray, with abundant yellow to red internal reflections
Streak
Red-orange to red
Luster
Resinous, Greasy
Refractive
Index
n = 2.538 n = 2.684 n = 2.704
Diaphaneity
Transparent
Cleavage
Distinct/GoodGood on , less good on
Crystal Habit:Prismatic striated crystals; more commonly massive, coarse to fine granular, or as incrustations
Realgar4258
Realgar4258
Realgar4257
Realgar4257
Realgar4254
Realgar4254
Realgar4252
Realgar4252
Realgar4246
Realgar4246
Realgar4243
Realgar4243
Realgar4238
Realgar4238
Realgar4234
Realgar4234
Realgar4233
Realgar4233
Realgar4229
Realgar4229
Realgar4224
Realgar4224
Realgar4219
Realgar4219
Realgar4214
Realgar4214
Realgar4213
Realgar4213
Realgar4204
Realgar4204
Realgar4202
Realgar4202
Realgar4199
Realgar4199

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