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TOURMALINE SLICE NATURAL
COLOR Hardness
7.5 |
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Set
tourmaline slice
43.00 cts.
Set polychromatic tourmaline Slice
20.5 x 16.6 mm.
Moderately included.
Enhancement: none (N)
Set
PRICE (5pcs.)
USD 295.00
ORIGIN: Madagascar ref:5pcs.
Tsl set4300
set(5
pcs.): 43.00cts.
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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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