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Inderborite
Current inventory:  0 gems
 

Inderborite

Chemistry:  CaMgB6O6(OH)10·6(H2O)  [Hydrated Calcium Magnesium Borate]

Discovered in 1940;   IMA status: Valid (pre-IMA; Grandfathered).
Inderborite is named for the locality that produced the first specimens, the Inder deposit, Kazakhstan, and boron, an essential chemical component.

 

Classification

   

   

Mineral Classification:

Borates

Strunz 8th Ed. ID:

5/H.06-30

Nickel-Strunz 10th Ed. ID:

6.CA.25

 

6 : BORATES
C : Triborates
A : Neso-triborates

Related to:

Kurnakovite - Solongoite Series

 

 

Crystal Data

   

   

Crystallography:

Monoclinic - Prismatic

Crystal Habit:

As well-formed prismatic crystals, to 10 cm, with a dozen forms noted; coarsely crystalline aggregates.

Twinning:

None

 

 

Physical Properties

   

 

Cleavage:

[100] Good

Fracture:

Conchoidal

Tenacity:

Brittle

Hardness (Mohs):

3.5

Density:

1.93 - 2.00 (g/cm3)

Luminescence:

None

Radioactivity:

Not Radioactive

Other:

Slowly soluble in cold water. Rapidly soluble in hot HCl.

 

 

Optical Properties

   

   

Color:

Colorless to White

Transparency:

Transparent

Luster:

Vitreous

Refractive Index:

1.482 - 1.540  Biaxial ( - )

Birefringence:

0.0480

Dispersion:

None

Pleochroism:

None

 

 

Occurances

   

   

Geological Setting:

With other borates in the caprock of a salt diapir (Inder deposit, Kazakhstan); in lacustrine borate deposits (Sarikaya, Turkey).

Common Associations:

Colemanite, Inyoite, Szaibélyite, Ulexite (Inder deposit, Kazakhstan)

Type Locality:

Deposit No. 6, Inder B deposit and salt dome, Atyrau (Gur'yev), Atyrau Oblysy (Atyrau Oblast'), Kazakhstan

Year Discovered:

1940

View mineral photos:

Inderborite Mineral Photos and Locations

 

 

More Information

   

   

 

Mindat.org
Webmineral.com

 

 


Inderborite is a very rare borate mineral that is rarely available as a faceted gem. It was discovered in 1940 at the Inder borate deposit, Kazakhstan. It is one of those unusual gems that are water soluble.

The main source of Inderborite crystals (and the Type Locality) is from the Inder borate deposit, Kazakhstan. Other locations include Sarikaya, near Kirka, Eskiçehir Province, Turkey; the Günevi mine, Bigadiç borate district, Balikesir Province, Turkey; the Furnace Creek district, Death Valley, Inyo County, California, USA; the Santa Rosa mine, Sijes district, Salta Province, Argentina.
 

  
Inderborite gems for sale:

We have not photographed our Inderborite gems. Please check back soon.
 

 

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