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GENUINE BLUE SAPPHIRE
Hardness 9 |
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SAPPHIRE BLUE
| Chemical properties:
corundum is composed of pure alumina; its colouring is due to metallic | | oxide traces or inclusions. The color of sapphire, due to iron and titanium oxide, gives its best | | effect under daylight. Electric light makes it often dark. | | Gems are generally found in alluvium, but come either from basaltic slags, or from metamorphized
marble. | | | | | 7.53 cts.
Genuine Oval blue sapphire single | | |  | | x | Pieces: |  | 1 Sapphire | x | x | Type: | | Genuine | | | | | | | | | | | | Color: | |
Dark Blue | | | Shape: | | Oval faceted | | | | | | | | | | | | | Weight: | | 7.53 Carats | | | Size: | | 13.2 x 10.7
mm. | | | | | | | | | | | | Clarity: | | NFL | | | Luster: | | Excellent | | | | | | | | | | | | Treatment: | | Heated (H) | | | Origin: | | Madagascar | | | | | | | | | | | Comment:
Dark blue. | | Refr. Index: | | 1.76-1.78 | | | Hardness | | 9 |
| There
is no window. |
| Hand
cut by
one of | |  | | | | | Depth:6.4
mm. |
| our
masters lapidaries.
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| Step
cut. |
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Stone
Price:
USD 2179.00
ref:SAbo753
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The SAbo753 do not shows
any silky veil, it is eye clean, but at the loupe you can see an inclusion
in the pavilion when you observe the stone up side down. This stone shows
a commercial blue with greenish sparkles.
The green sparkles are mixed with its
intrinsic blue color and are visible on half of the stone when the
sapphire is moving.
Let us say that the overall color of the
stone is affected by a blue-green color. This sapphire is not a bi-color
stone. |
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SAPPHIRE BLUE |
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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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