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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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2.22 cts. Cushion tourmaline single |
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Pieces: |
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1 Tourmaline |
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Type: |
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100% Natural |
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Color: |
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Green |
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Shape: |
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Cushion |
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Weight: |
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2.22 Carats |
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Size: |
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7.5 x 7.3 mm |
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Clarity: |
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Very slightly included. |
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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: medium |
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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: 5.6 mm. |
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| Stone Price: USD 650.00
ref:Tgc222
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Very fine -- |
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