Sulfur
Image: <a href="//commons.wikimedia.org/wiki/User:S%C3%A9mhur" title="User:Sémhur">Sémhur</a> (<a href="//commons.wikimedia.org/wiki/User_talk:S%C3%A9mhur" title="User talk:Sémhur"><span class="signature-talk">talk</span></a>) (CC BY-SA 4.0)
Mineral NameSulfur
Chemical FormulaS
Mohs Hardness1.5
Crystal Systemorthorhombic
Lusterresinous
Streak Colorwhite to pale yellow
Cleavagepoor/imperfect on {001} and {110}
Fractureconchoidal
Specific Gravity2.07
Colorsyellow, orange-yellow, greenish-yellow
Transparencytransparent to translucent
Type LocalityKawah Ijen, Indonesia
Mineral GroupNative Elements
Usesindustrial (sulfuric acid, fertilizers, pesticides), medicinal, gunpowder, rubber vulcanization
Associated Mineralsgypsum, pyrite, other sulfates and sulfides, volcanic rocks
Raritycommon
Description
The image displays bright yellow deposits of sulfur, often mixed with grey volcanic rock, with thick white steam billowing from fumaroles. Miners are actively collecting the solidified sulfur in a volcanic crater.
Geological Context
Sulfur commonly forms in volcanic and fumarolic environments where hydrogen sulfide gas reacts with oxygen or sulfur dioxide, precipitating as solid elemental sulfur. It is a direct product of volcanic outgassing and hydrothermal activity.
