Name/Title
CallaghaniteEntry/Object ID
2009.62.32Description
Chemical Composition: Cu2Mg2(CO3)(OH)6•2(H2O)
Crystal System: Monoclinic System
Description: Common Name: Callaghanite
Chemistry: Cu2Mg2(CO3)(OH)6•2(H2O)
Group: Carbonates
Location: Gabbs, Gabbs district, Nye County, Nevada, USA
Description: Blue crystals of callaghanite on what appears to be diorite matrix
Physical Properties of Callaghanite
Crystal System: Monoclinic
Cleavage: {111} Perfect, {111} Perfect
Color: Azure, Violet blue.
Density: 2.71
Diaphaneity: Transparent
Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Hardness: 3-3.5 - Calcite-Copper Penny
Luster: Vitreous (Glassy)
Streak: white
Fracture: brittle
Hardness: 3 Calcite
Luster: Vitreous
Occurrence: Disseminated in the contact zone between diorite and serpentinized dolostone
Rock Type: Sedimentary
Specific Gravity: 2.71
Streak: white
Texture: Crystalline to mircocrystalline
Variety: Callaghanite is a carbonate mineral which contains copper and magnesium and is fairly rare found in Nye Co. Neveda. Assicated minerals are magnesite, dolomite, serpentine, brucite, forsterite.Collection
RAGM Mineral CollectionAcquisition
Accession
2009.62Source or Donor
Museum Collection of MineralsAcquisition Method
DonationDimensions
Width
3 inDepth
3-1/2 inLength
5-1/2 inWeight
0.46 ozDimension Notes
Dimension taken at widest pointsLocation
Location
Shelf
CS-I-1Room
Curation StorageBuilding
Crater Rock MuseumDate
February 3, 2024