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 RHODIZITE                                   NATURAL COLOR                                  Hardness 8.5

 7.03 cts.12.2 x 12.4 mm.Rhodizite  (externally slightly damaged) Origin:  Madagascar.   3.74 cts.x  mm.Rhodizite  (externally slightly damaged) Origin:  Madagascar.  Aprox 1.2 ct. .6x6 mm. 1 pce &  Aprox 2.2 cts.7 x 7 mm. 1 pce  Rhodizite  (externally undamaged) Origin:  Madagascar.   
Pick it up from the lot: Sample   Enlarge
 SOLD  ref:Rhozc703  SOLD  ref:Rhozc374 USD 8 .00   ref:Rhozflot8$ 

USD 10 .00   ref:Rhozflot10$ 

 Enlarge 30 grms. Rhodizite on matrix Overall size of mineral specimen: 45.81x20 x 30 mm. individual crystal:14x 11.1 mm. (externally un damaged) Origin: Sahatany Valley, Madagascar.  Enlarge  30 grms. Rhodizite on matrix. Overall size of mineral specimen: 47 x 29 x 24 mm. individual crystal: 9.2x7.5 mm. (Translucent, externally undamaged) Origin: Sahatany Valley, Madagascar. 10.8 cts.13.4 x 13.5 x 9  mm. Yellow Rhodizite  (The base of the crystal is damaged because of its contact with its bedrock) Origin:  Madagascar.  
USD 240.00    ref:Rhozr30g  USD 285.00    ref:Rhozr30gr  USD 185.00   ref:Rhozr108c 

 Enlarge 58 grms. Rhodizite on matrix Overall size of mineral specimen: 56.5x30.5 x 32.5  mm. individual crystal:16x 13.6 mm. (externally un damaged) Origin:  Sahatany Valley, Madagascar.  Enlarge  720 grms.  Rhodizite on matrix. Overall size of mineral specimen: 107.7 x 107.5 x 81  mm. individual crystal: 27.6x25.3 mm. (externally undamaged) Origin: Sahatany Valley, Madagascar. 5.65 cts.10.8 x 11.4 x 8 mm.Yellow Rhodizite  (The base of the crystal is damaged because of its contact with its bedrock) Origin: Manapa,  Madagascar.  
USD 460.00    ref:Rhozr58g  USD 720.00    ref:Rhozr720g  USD 99.00   ref:Rhozr565c 
 Enlarge 108 grms. Black Rhodizite with shorl tourmaline on matrix Overall size of mineral specimen: 74x58 x 27  mm. individual crystals:10x 9.4 mm. (externally un damaged) Origin:  Sahatany Valley, Madagascar.  Enlarge  18 grms.  Rhodizites on matrix. Overall size of mineral specimen: 36.5 x 14.5 x 20 mm. individual crystal: 16.7x14.2 mm. (Glossy, externally undamaged) Origin: Manapa, Madagascar. 20.05 cts.17.5 x1 5.5 x 9.4 mm. Yellow Rhodizite  (The base of the crystal is damaged because of its contact with its bedrock) Origin:  Madagascar.  
SOLD  ref:Rhozr108g  USD 495.00    ref:Rhozr18g  SOLD   ref:Rhozr2005c2005c

 Enlarge 44 grms.3 Rhodizites on matrix Overall size of mineral specimen: 47x31 x 36.2 mm. individual crystal:12x 12.8 mm. (Glossy translucent, externally un damaged) Origin:  Manapa, Madagascar.  Enlarge  70 grms. 2 Rhodizites on matrix. Overall size of mineral specimen: 62.5 x 39 x 25 mm. individual crystal: 15.5x15.7 mm. (Glosssy, externally undamaged) Origin: Manapa, Madagascar. Enlarge 70 grms. Rhodizite on matrix Overall size of mineral specimen: 42x34 x 58  mm. individual crystals:10.6x 10.6 mm. (Glosssy, externally un damaged) Origin: Manapa, Madagascar.
USD 385.00   ref:Rhozr44g  USD 385.00   ref:Rhozr70gr  USD 320.00   ref:Rhozr70g 

 

 Enlarge 192 grms.2 Rhodizites on matrix Overall size of mineral specimen: 78.4x71 x 43 mm. individual crystal:19.8x 19.3 mm. (Glossy, externally un damaged) Origin:  Manapa, Madagascar.  Enlarge  252 grms. Rhodizite on matrix. Overall size of mineral specimen: 73 x 58 mm. individual crystals: 12x12 mm. (Glossy, externally undamaged) Origin: Manapa, Madagascar.  

 

Enlarge  434 grms. 2 Rhodizites on matrix. Overall size of mineral specimen: 81.7 x 79.8 x 55 mm. individual crystal: 15.8x18.2 mm. (Glossy, externally undamaged) Origin: Manapa, Madagascar.

USD 860.00    ref:Rhozr192g  USD 410.00   ref:Rhozr252g  USD 720.00   ref:Rhozr434g 

 Enlarge 154 grms.2 Rhodizites on matrix Overall size of mineral specimen: 71x59 mm. individual crystals:12x 13 mm. (externally un damaged) Origin:  Sahatany Valley, Madagascar.  Enlarge 198 grms. 2 Rhodizites on matrix. Overall size of mineral specimen: 73 x 58 mm. individual crystals: 12x12 mm. (externally undamaged) Origin: Sahatany Valley, Madagascar. 16.02 cts.15.5x15.5  mm.Rhodizite  (externally slightly damaged) Origin:  Madagascar.  
USD 195.00    ref:Rhozr154g  USD 185.00    ref:Rhozr198g   SOLD   ref:Rhozr1602 

58 grms. Rhodizite on matrix.Overall size of mineral specimen: 58x32  mm.  individual crystal:6.6x6 mm.(externally undamaged) Origin:  Madagascar. 12 grms. Rhodizite on matrix.Overall size of mineral specimen: 31 x 27 mm. individual crystal: 8x9 mm. (externally undamaged) Origin:  Madagascar. 14 grms. Rhodizite on matrix with rubellite.Overall size of mineral specimen: 30 x25  mm. individual crystasl: 8.5x7 mm.  & 16.5 x 13 mm.(externally undamaged) Origin:  Madagascar.
USD 85.00  ref:Rhozr58g  USD 85.00   ref:Rhozr12g  USD 195.00   ref:Rhozr14g 

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144 grms. Rhodizite on matrix.Overall size of mineral specimen: 58x52  mm.  individual crystal:10.8x10 mm.(externally undamaged) Origin:  Madagascar.  186 grms. Rhodizite on matrix. Overall size of mineral specimen: 75  x 50  mm. individual crystals: 15.5 x 14 mm.  (externally undamaged) Origin:  Madagascar.  36 grms. Rhodizite on matrix. Overall size of mineral specimen: 32 x 33 mm (individual crystals: 14 x 12 mm.externally damaged) Origin:  Madagascar.
USD 85.00  ref:Rhozr58g  USD 290.00    ref:Rhozr186g  USD 170.00    ref:Rhozr36g 

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 232 grms.Rhodizites on matrix Overall size of mineral specimen: 85 x 60 mm. individual group of crystals: 29.5 x 24.5  mm. (externally un damaged) Origin:  Sahatany Valley, Madagascar.   180 grms. 2 Rhodizites on matrix. Overall size of mineral specimen: 60  x 60  mm. individual crystal: 11 x 11 mm. (externally undamaged) Origin: Sahatany Valley, Madagascar.   306 grms. 2 Rhodizites on matrix. Overall size of mineral specimen: 80 x 58  mm. individual crystal: 17.5  x 17 mm. (externally undamaged) Origin: Sahatany Valley, Madagascar. Enlarge
USD 700.00    ref:Rhozr232g  USD 86.00    ref:Rhozr180g  USD 720.00    ref:Rhozr306g 

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 52 grms.2 Rhodizites on matrix Overall size of mineral specimen: 50 x 26 mm. individual crystals: 20 x 12.5  mm. (externally un damaged) Origin:  Sahatany Valley, Madagascar.  54  grms. 2 Rhodizites on matrix. Overall size of mineral specimen:  50x 40 individual crystals: 22x16.5 mm.(externally damaged) Origin: Sahatany Valley, Madagascar.   64 grms. Rhodizite on matrix. Overall size of mineral specimen: 50  x 30  mm. individual crystals: 8.5 x 7.5  mm. (externally undamaged) Origin:  Madagascar.
 SOLD    ref:Rhozr52g  USD 140.00    ref:Rhozr54g   SOLD    ref:Rhozr64g 

 

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 72 grms. Rhodizite on matrix Overall size of mineral specimen: 35 x 30  mm. individual crystals: 9 x 9  mm. (externally un damaged) Origin:  Sahatany Valley, Madagascar.   140 grms.  Rhodizite on matrix. Overall size of mineral specimen: 75  x 35  mm. individual crystals: 20 x 15.7 mm. (externally undamaged) Origin: Sahatany Valley, Madagascar.   102 grms. Rhodizite on matrix. Overall size of mineral specimen:  60 x 50  mm. individual crystal: 12.5 mm (externally undamaged) Origin:  Madagascar.
USD 85.00    ref:Rhozr72g  USD 700.00    ref:Rhozr140g  USD 115.00    ref:Rhozr102g 

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General information

 Chemical Formula: (K,Cs)Al4Be4(B,Be)12O28
 Composition: Molecular Weight = 778.83 gm
   Cesium     4.27 %  Cs    4.52 % Cs2O
   Potassium  3.77 %  K     4.54 % K2O
   Beryllium  8.10 %  Be   22.48 % BeO
   Aluminum  13.86 %  Al   26.18 % Al2O3
   Boron     12.49 %  B    40.22 % B2O3
   Oxygen    57.52 %  O
            ______        ______
            100.00 %       97.95 % = TOTAL OXIDE
 Empirical Formula: K0.75Cs0.25Al4Be412(B0.75)12(Be0.25)O28
 IMA Status: Approved IMA 1965
 Locality: Sahanivotry, Sahatany Valley, Madagascar.
 

Rhodizite Image

 

Several  gemmy crystals of Rhodizite frozen in a feldspar matrix. Sahanivotry, Sahatany Valley, Madagascar.

 

Crystallography

 Cell Dimensions: a = 7.317, Z = 1; V = 391.74 Den(Calc)= 3.30
 Crystal System: Isometric - Hextetrahedral H-M Symbol (-4 3m) Space Group: P43m-
 X Ray Diffraction: By Intensity(I/Io): 2.983(1) 2.44(0.5) 3.27(0.5)
 

Physical Properties

 Cleavage: [???] Indistinct
 Color: colorless, grayish, yellow, yellowish white, or white.
 Density: 3.44
 Diaphaniety: Transparent to Translucent
 Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
 Hardness: 8.5 - Chrysoberyl
 Luster: Vitreous - Adamantine
 Streak: white
 

Optical Properties

 Optical Data: Isotropic, n=1.6935.
 

Classification

 Dana Class: Anhydrous Borates Containing Hydroxyl or Halogen
  Dana Type
  Dana Group
 
25.8.2.1 Rhodizite (K,Cs)Al4Be4(B,Be)12O28 P43m- -4 3m
 
 (Cs,K)Al4Be4(B,Be)12O28 P43m- -4 3m
 Strunz Class:  Nitrates, Carbonates and Borates
  Shelly borates with [BO2]1- to [B6O10]2-
   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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