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Pararealgar (Photo)

Year of discovery: 1980 (Grey Rock mine, Canada, and Mt Washington mine, Canada), 2005 (Japan)

Locality list: 3 localities of pararealgar

• As₄S₄
• γ-[As₄][S₄]

• Class: Sulfide
• Formed by alteration of Realgar on light exposure.

• Polymorph: Realgar (α, Monoclinic), Alacránite (Alacranite) (β, Monoclinic)

• Color: Pale yellow, Orange yellow
• Streak: Pale yellow
• Luster: Resinous
• Diaphaneity; Translucent

• Habit: Powder, Fine granular

• Cleavage: No
• Hardness: 1-1.5
• Density: 3.5

• System: Monoclinic
• Group: 2/m, P2₁/b
• Lattice: a=9.9, b=9.7, c=8.5, β=97.2