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HAMBERGITE                               NATURAL COLOR                        Hardness 7.5 

HAMBERGITE FACET

  

The HAMBERGITE crystal is externally undamaged.  Enlarge

 6.64 cts. Hambergite rough  single 

 22.9 x 8.5 mm. nice shape (whole)

Enhancement: none (N)

stone PRICE  

USD 620.00 ON HOLD

ORIGIN: Madagascar

ref:HAr664 

 

    Enlarge  16.84 cts. Hambergite crystal  single 

 39.5 x 9.3 x 5.6 mm. nice shape (whole) Transparent, gem quality.

Enhancement: none (N) Untreated

stone PRICE  

USD  1180.00 

ORIGIN: Madagascar

ref:HAr1684 

 

   Enlarge  30.17 cts. Hambergite rough  single 

 31 x 15 mm. nice shape (whole)

Enhancement: none (N)

The HAMBERGITE crystal is externally      undamaged.

Enhancement: none (N)

stone PRICE  

USD  2100.00

ORIGIN: Madagascar

ref:HAr3017 

T

    2.87 cts. Hambergite rough  single 

  16.8x 9.6 mm. nice shape (whole)

Enhancement: none (N)

 

stone PRICE  

USD 199.00 

ORIGIN: Madagascar

ref:HAr287 

 

   2.13 cts. Hambergite rough  single 

  15.4x7.4  mm. nice shape (whole)

Enhancement: none (N)

stone PRICE  

USD 110.00 

ORIGIN: Madagascar

ref:HAr213 

 

    1.59 cts. Hambergite rough  single 

  13.6x8.4  mm. nice shape (whole)

Enhancement: none (N)

The HAMBERGITE crystals is externally undamaged.

stone PRICE  

USD 90.00 

ORIGIN: Madagascar

ref:HAr159 

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General Information

 Chemical Formula: Be2BO3(OH)
 Composition: Molecular Weight = 93.84 gm
   Berylium 19.21 %  Be   53.31 % BeO
   Boron 11.52 %  B    37.09 % B2O3
   Hydrogen   1.07 %  H     9.60 % H2O
   Oxygen    68.20 %  O
            ______        ______
            100.00 %      100.00 % = TOTAL OxIDE
 Empirical Formula: Be2(BO3)(OH)
 Locality: HEL,  MADAGASCAR
 

Hambergite Images

 
       

Click on the picture to go to facet  Hambergite.
  Image by A. Darbellay

Crystallography

 Axial Ratios: a:b:c =0.798:1:0.3622
 Cell Dimensions: a = 9.76, b = 12.23, c = 4.43, Z = 8; V = 528.79 Den(Calc)= 2.36
 Crystal System: Orthorombic-Dipyramidal  H-M Symbol (2/m 2/m 2/m) Space Group: Pbca
 x Ray Diffraction: By Intensity(I/Io): 3.82(1)3.13(0.9)4.53(0.8)
 

Physical Properties

 Cleavage: [010] Perfect, [100] Good
 Color: colorless, gray white, yellowish white, or white.
 Density: 2.372
 Diaphaniety: Transparent to Translucent
 Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
 Hardness: 7.5 - Garnet
 Luminescence: -----
 Luster: Vitreous - Dull
 Streak: white
 

Optical Properties

 Optical Data: Biaxial (+), a=1.55, b=1.59, g=1.63, bire=0.0800
 Pleochroism (x): colorless.
 Pleochroism (y): colorless.
 Pleochroism (z): colorless.
 

Classification

 Dana Class: Anhydrous Borates Containing Hydroxyl or Halogen
  Dana Type
  Dana Group
 Strunz Class:  Nitrates, Carbonates and Borates
   Shelly borates with [BO2]1- to [B6O10]2-
   STRUNZ V/L.02-10 - Nitrates, Carbonates and Borates [Shelly borates with [BO2]1- to [B6O10]2- {Hambergite - Rhodizite series}]
 
 Hambergite Be2BO3(OH) Pbca 2/m 2/m 2/m
 
 Rhodizite (K,Cs)Al4Be4(B,Be)12O28 P43m- -4 3m
 
 
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