Sulfur
| Refractive Index : 2.245 – 1.958 |
| Optical Characteristic : DR, B+ |
| Specific Gravity : 2.09 – 2.05 |
| Formula : S8 |
| Crystal System : Orthorhombic |
| Variety/Species : All |
| Species/Group : Sulfur |
| Birefringence : 0.291 |
| Dispersion : 0.155 |
| Hardness : 1.5 to 2.5 |
| Toughness : poor |
| Ultrasonic : Never |
| Steam : Never |
| UV Long : Inert |
| UV Short : Inert |
| Pleochroism : None |
| Strength : N/A |
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| Pleochroism Colors : None |
| Heat : sensitive |
| Acids : sensitive |
| Light : stable |
| Polish Luster : Resinous to greasy |
| Fracture : Uneven to conchoidal |
| Fracture Luster : |
| Clarity Type : N/A |
| Tones : N/A |
| Saturations : N/A |
| Cause of Color : |
| Enhancements : none |
| Cleavage : Imperfect |
| Color Range : Yellow, yellowish brown, yellowish gray, orange, brownish, grayish, reddish, greenish, orangy, whitish |
| Transparency : Transparent to translucent |
| Phenomena : None |
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| Separations : Sulfur from- |
| Identifying Characteristics and information Cut for collectors only. Sulfur is very soft and dissolves in water making it extremely difficult to cut. It is also brittle. White streak. |
| Spectral Data not diagnostic. |
| Trade Names and Misnomers Brimstone Schwefel Soufre Sulfur Sulphur |
Tags: Orthorhombic, sulfur
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