If it’s bright yellow and smells of eggs, matches, and/or flatus, it’s sulfur.
Physical Properties |
|
| Chemical formula | S |
| Class | Native element |
| Crystal system | Orthorhombic |
| Habit | Hexagonal tablets Foliated masses Scaly masses Radiating or granular aggregates |
| Color | Bright yellow |
| Hardness | 1.5 to 2.5 |
| Specific gravity | 2.1 |
| Cleavage | Poor {101} and {110} |
| Fracture | Conchoidal |
| Luster | Resinous |
| Transparency | Transparent to translucent |
| Streak | White |
Optical Properties |
|
| PPL | Pale yellow Often pleochroic Extreme relief |
| XPL | Extremely high birefringence |
| δ | 0.29 |
| Special properties | Sulfurous odor (bet you didn’t see that coming) |
| after Perkins, 354-355 |
Sulfur in Hand Sample
Hand sample of sulfur (it’s basically just a lot of yellow)
Sulfur in Thin Section
Stay tuned!