| |
LOOSE
GREEN
TOURMALINE
NATURAL COLOR
Hardness
7.5 |
|
3.45
cts. Green tourmaline
faceted
emerald cut Single
8.00
x 8.60 mm.
loupe clean. Enhancement:
none (N)
stone PRICE
SOLD
ORIGIN: Madagascar
ref:Tge
345 |
Hardness: |
7
- 7.5 |
Specific
Gravity: |
3.0+ |
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Tourmaline
data
|
Refractive
Index: |
1.62
- 1.68 |
Chemical
Composition: |
Na(Li,Al)3Al6Si6O18(BO3)3
(OH)4, Sodium Lithium Aluminum Boro-Silicate Hydroxide |
Crystal
Structure: |
Trigonal |
|