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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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8.64 cts. Cushion tourmaline single |
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x |
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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8.64 Carats |
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Size: |
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11.6
x 11.3 mm |
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Clarity: |
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FL |
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Luster: |
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Good |
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Treatment: |
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None (N) |
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Origin: |
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Brazil |
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We use a microscopic photography system. |
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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:7.7 mm. |
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Stone
Price:
Enquire ref:Tgc864
Tone
scale: medium.
This stone has
an obviously Green color under daylight the coloration is yG and under
incandescent light, the coloration is G.
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RETURN TO »»
TOURMALINE GREEN |
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To
purchase a stone click to ORDER
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Very
fine -- |
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Fine
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Good
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-
Scale determining the purity of a stone.
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FL |
NFL |
SI1 |
SI2 |
MI1 |
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Flaw
less |
Near
flaw less |
Slightly
included 1 |
Slightly
included 2 |
Medium
included 1 |
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MI2 |
MI3 |
VI1 |
VI2 |
HI |
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Medium
included 2 |
Medium
included 3 |
Very
included 1 |
Very
included 2 |
Highly
included |
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