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Mineralpedia Details for Inderite

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Inderite

Inderite

Named for the type locality near Inder Lake in Kazakhstan. A rare mineral, localities for Inderite include in, additionally, the United States, Argentina, and Turkey, as well as newer localities in China, Russia, and Italy. Inderite occurs as a primary mineral in lacustrine borate deposits. Associated minerals include hydroboracite, borax, ulexite, orpiment, realgar, and kurnakovite. Primary hydrated Borate found in white (altered) to clear prismatic crystals. Most notable from Boron, California.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/inderite.pdf

Formula
MgB3O3(OH)5ยท5H2
Crystal System
Monoclinic 
Crystal Habit
Euhedral Crystals, Massive 
Cleavage
Good, None, None 
Luster
Vitreous (Glassy) 
Color
colorless, white, pink 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
2.5 
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Inderite from Pacific Coast Borax Mine, Boron, Kern Co., California

Inderite
            from Pacific Coast Borax Mine, Boron,  Kern Co., California

Inderite is a relatively rare hydrated magnesium borate found at only two US localities and just a handful worldwide. It is a primary borate with elongated clear prismatic crystals the length of the entire specimen (9cm) with surface alterations.

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