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TOURMALINE CRYSTAL NATURAL COLOR
Hardness
7.5 |
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TOURMALINE
CRYSTAL
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19.82
cts. Tourmaline crystal Single
30.5
x 9.4 mm.
Enhancement: none
(N)
stone PRICE USD
150.00
ORIGIN: Madagascar
ref:Tr1982
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| Hardness: |
7
- 7.5 |
| Specific
Gravity: |
3.0+ |
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| Refractive
Index: |
1.62
- 1.68 |
 Tourmaline
data |
| Chemical
Composition: |
Na(Li,Al)3Al6Si6O18(BO3)3
(OH)4, Sodium Lithium Aluminum Boro-Silicate Hydroxide |
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| Crystal
Structure: |
Trigonal |
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| Exceptional
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