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Diameter, mm (1mm - 0,039inch)

Realgar mineral - You can buy these samples

Realgar is an uncommon mineral of low-temperature hydrothermal origin. Accompanies lead, gold and silver ores. Arsenic in the composition of realgar forms a stable chemical compound, starting to be released only when heated above three hundred degrees Celsius.
You can see realgar stone for sale and buy it in the Minerals of Russia online store.

 Physical properties of Realgar

General
Category Sulfide mineral
Formula
(repeating unit)
As4S4 or AsS
IMA symbol Rlg
Strunz classification 2.FA.15a
Crystal system Monoclinic
Crystal class Prismatic (2/m)
(same H-M symbol)
Space group P21/n (no. 14)
Unit cell a = 9.325(3) Å
b = 13.571(5) Å
c = 6.587(3) Å
β = 106.43°; Z = 16
Identification
Color Red to yellow-orange; in polished section, pale gray, with abundant yellow to red internal reflections
Crystal habit Prismatic striated crystals; more commonly massive, coarse to fine granular, or as incrustations
Twinning Contact twins on {100}
Cleavage Good on {010}; less so on {101}, {100}, {120}, and {110}
Tenacity Sectile, slightly brittle
Mohs scale hardness 1.5–2
Luster Resinous to greasy
Streak Red-orange to red
Diaphaneity Transparent
Specific gravity 3.56
Optical properties Biaxial (-)
Refractive index nα = 2.538
nβ = 2.684
nγ = 2.704
Birefringence δ = 0.166
Pleochroism Nearly colorless to pale golden yellow
2V angle 40°
Dispersion r > v, very strong
Other characteristics Toxic and carcinogenic. Disintegrates on long exposure to light to a powder composed of pararealgar or arsenolite and orpiment.
Code: 2580
Sukhonkoe, Altai, RF
18*17*5mm

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Code: 1284
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Code: 1285
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70*35*15mm

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Code: 913
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58*30*7mm

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Code: 1286
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51*39*17mm

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Code: 2777
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42*16*7mm

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Code: 2581
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23*15*4mm

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Code: 2469
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0.00 $ $24.73

Code: 2470
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23*12*17mm

0.00 $ $16.36

Code: 2471
Sukhonkoe, Altai, RF
24*16*5mm

0.00 $ $16.36

Code: 2031
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23*13*8mm

0.00 $ $16.36

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