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| NATURAL
GREEN
TOURMALINE NATURAL COLOR
Hardness
7.5 |
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| Tourmaline chemical composition is (Na, Li,Ca) (Fe2, Mg, Mn, Al)3 Al6 I(OH)4 I (BO3)3ISi6O18I . |
| Crystaline system: Trigonal. |
| Occurences: In the acid magmatic rocks and associated pegmatites, limestones and schists, placers. |
| Coloured tourmalines are related to sodolithic pegmatites. | One distinguishes two principal types of tourmalines: the hexagonal type and the triangular one. |
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8.12
cts. Cushion tourmaline single |
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Pieces: |
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1
Tourmaline |
x |
x |
Type: |
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100% Natural |
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Color: |
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Green-blue |
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Shape: |
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Cushion |
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Weight: |
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8.12
Carats |
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Size: |
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13.1
x 10.5 mm |
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Clarity: |
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FL. |
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Luster: |
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Excellent |
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Treatment: |
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None
(N) |
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Origin: |
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Afghanistan |
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| Color
tone: Dark |
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Refr. Index: |
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1.62-1.64 |
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Hardness |
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7.5 |
| The actual gemstone is smaller than the images shown. |
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Depth:
7.5 mm. |
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| Stone Price: SOLD ref:GrToe812
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TOURMALINE GREEN |
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