White Salt Crystal Lamp (Halite)

Physical Properties

Hardness: 2-2.5 on Mohs scale; Color: White to colorless (when pure); Luster: Vitreous; Crystal Structure: Isometric/Cubic; Cleavage: Perfect cubic; Specific Gravity: 2.16

Formation & Geological History

Formed by the evaporation of saline lake or seawater in arid basins. These deposits, known as evaporites, can be hundreds of millions of years old, often dating to the Permian or Precambrian periods.

Uses & Applications

Used primarily as decorative salt lamps, in chemical industries for soda ash and chlorine production, food seasoning, and de-icing roads.

Geological Facts

Salt lamps are often marketed with claims of air purification via ionization, though these claims have little scientific backing. White salt is chemically the same as pink Himalayan salt but lacks the iron oxide impurities that cause the red tint.

Field Identification & Locations

Identified by its salty taste (though not recommended to lick specimens in the field due to potential toxins), its softness (can be scratched by a copper penny), and its cubic cleavage. Found in massive underground salt domes or dried lake beds like the Khewra Salt Mine.

Identified on: 4/19/2026

Mode: Standard