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| LOOSE BLUE TOPAZ Hardness 8 |
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RETURN TO »» TOPAZ Online Certificate
| Chemical Composition: Al2(SiO4) (FOH)2 Aluminum fluosilicate |
| Crystal Structure: Orthorombic |
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| Gems are generally found in pegmatites or in alluvium. |
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16.48 cts. Octagon blue Topaz single |
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Pieces: |
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Topaz |
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Type: |
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Genuine |
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Color: |
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Blue |
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Shape: |
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Octagon faceted |
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Weight: |
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16.48 Carats |
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Size: |
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16.1 x 12.5 mm. |
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Clarity: |
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FL |
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Luster: |
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Excellent |
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Treatment: |
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Heated (H) |
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Origin: |
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Brazil |
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| We use a microscopic photography |
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Refr. Index: |
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1.61 - 1.638 |
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Hardness |
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8 |
| system. The actual gemstone is smaller than the images shown. |
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| Tone: medium blue |
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| Stone price: SOLD
ref: Tpo1648 
Depth: 8.6 mm.
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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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