RHODIZITE NATURAL COLOR Hardness 8.5 |
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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. |
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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. |
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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 |
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USD 285.00 ref:Rhozr30gr |
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USD 185.00 ref:Rhozr108c |
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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. |
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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. |
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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 |
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USD 720.00 ref:Rhozr720g |
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USD 99.00 ref:Rhozr565c |
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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. |
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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. |
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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 |
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USD 495.00 ref:Rhozr18g |
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SOLD ref:Rhozr2005c2005c |
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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. |
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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. |
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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 |
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USD 385.00 ref:Rhozr70gr |
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USD 320.00 ref:Rhozr70g |
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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. |
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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. |
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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.
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USD 860.00 ref:Rhozr192g |
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USD 410.00 ref:Rhozr252g |
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USD 720.00 ref:Rhozr434g |
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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. |
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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. |
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16.02 cts.15.5x15.5 mm.Rhodizite (externally slightly damaged) Origin: Madagascar. |
USD 195.00 ref:Rhozr154g |
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USD 185.00 ref:Rhozr198g |
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SOLD ref:Rhozr1602 |
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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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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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General information
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Chemical Formula: |
(K,Cs)Al4Be4(B,Be)12O28 |
Composition: |
Molecular Weight = 778.83 gm |
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Cesium 4.27 % Cs 4.52 % Cs2O |
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Potassium 3.77 % K 4.54 % K2O |
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Beryllium 8.10 % Be 22.48 % BeO |
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Aluminum 13.86 % Al 26.18 % Al2O3 |
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Boron 12.49 % B 40.22 % B2O3 |
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Oxygen 57.52 % O |
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______ ______ |
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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. |
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Rhodizite Image
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Several gemmy crystals of Rhodizite frozen in a feldspar matrix. Sahanivotry, Sahatany Valley, Madagascar.
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Crystallography
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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) |
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Physical Properties
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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 |
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Optical Properties
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Optical Data: |
Isotropic, n=1.6935. |
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Classification
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Dana Class: |
Anhydrous Borates Containing Hydroxyl or Halogen |
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Dana Type |
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Dana Group |
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- 25.8.2.1 Rhodizite (K,Cs)Al4Be4(B,Be)12O28 P43m- -4 3m
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- (Cs,K)Al4Be4(B,Be)12O28 P43m- -4 3m
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Strunz Class: |
Nitrates, Carbonates and Borates |
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Shelly borates with [BO2]1- to [B6O10]2- |
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Nitrates, Carbonates and Borates [Shelly borates with [BO2]1- to [B6O10]2- {Hambergite - Rhodizite series}] |
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- Hambergite Be2BO3(OH) Pbca 2/m 2/m 2/m
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- Rhodizite (K,Cs)Al4Be4(B,Be)12O28 P43m- -4 3m
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