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TOURMALINE SLICE NATURAL
COLOR Hardness
7.5 |
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Set
tourmaline slice
  
86
grms. Set polychrome
tourmaline Slice
Enlarge
79.3 x 56.6 mm.
Moderately included.
Enhancement: none (N)
Set
PRICE (3pcs.)
SOLD
ORIGIN: Madagascar ref:
Set
Tsl 86gr
set(3
pcs.): 129.07ct  |
| Hardness: |
7
- 7.5 |
Growth
zoning in a tourmaline crystal. |
| Specific
Gravity: |
3.0+ |
| 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 |
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These
stones where found in alluvium.
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