Image: <bdi><a href="https://www.wikidata.org/wiki/Q126871368" class="extiw" title="d:Q126871368"><span title="photographer from the United States">Darla Sondrol</span></a></bdi> (CC0)
tetragonaluncommonHalides
Calomel
Hg₂Cl₂
This 6 cm wide sample displays yellowish-brown calomel, a mercury halide mineral, with a somewhat earthy or dull luster.
Calomel Physical Properties
Mohs Hardness
1.5Crystal System
tetragonalLuster
adamantineStreak Color
pale yellowish whiteCleavage
distinct on {110}Fracture
conchoidalSpecific Gravity
7.15Colors
white, yellowish-white, gray, brownTransparency
translucentType Locality
Moschellonsberg, GermanyMineral Group
HalidesUses
minor ore of mercury, collectorAssociated Minerals
cinnabar, native mercury, quartz, calciteRarity
uncommonGeological Context
Calomel is a secondary mineral typically found in the oxidized zones of mercury ore deposits, forming from the alteration of primary mercury minerals like cinnabar or native mercury.
