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UNTREATED RUBY NATURAL
COLOR
Hardness 9 |
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RUBY
| Chemical properties:
corundum is composed of pure alumina; its colouring is due to metallic | | oxide traces or inclusions. The color of
RUBY, due to chromium oxide, gives its best | | effect under
electric lighting. | | Gems are generally found in alluvium, but come either from basaltic slags, or from metamorphized
marble. | | | | | 1.04 cts.
Trillion cut natural
ruby single | | | 
| | x | Pieces: |  | 1
Ruby | x | x | Type: | | 100% Natural | | | | | | | | | | | | Color: | | Red | | | Shape: | | Trillion faceted | | | | | | | | | | | | | Weight: | | 1.04 Carats | | | Size: | |
6.5 x 6.6 x 3.9 mm. | | | | | | | | | | | | Clarity: | | SI2 | | | Luster: | | Very
Good | | | | | | | | | | | | Treatment: | | None
(N) | | | Origin: | | Madagascar | | | | | | | | | | | Comment:
a few mica inclusions | | Refr. Index: | | 1.76-1.78 | | | Hardness | | 9 | | unsignifiant
at the naked eye. | | | | | | | Depth:
3.9 mm. |  | | Verry
nice red. | 
| Untreated in any way.
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RUBY |
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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 |
 |
 |
 |
 |
 |
| Medium
included 2 |
Medium
included 3 |
Very
included 1 |
Very
included 2 |
Highly
included |
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