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| Sapphire |
Rhodolite |
Hessonite |
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 |
 |
 |
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| Hardness
9 on the Mohs scale and |
Hardness
7,25 and density 3,78 - |
Hardness
7,25 and density 3,58 |
| density
3,95 - 4,1sapphire belongs to |
3,90
this garnet is the happy |
-
3,65 This garnet belongs to the |
| the
family of corundums, it occupies |
conjunction
between Pyrope and |
family
of grossularites. |
| the
second rank behind diamond by |
Almandite.
It belongs to the cubic |
|
| its
hardness. |
system
as well as diamond. |
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| Malaya garnet |
Iolite |
Rubellite |
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 |
 |
 |
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| Hardness
7,25 and density 3,74 - |
Hardness
7.5 density 2,58 - 2,66 |
Hardness 7-7.5 density 3.02 to
|
| 4,00
This stones shows an |
This
gem is also appreciated by |
3.26 This red tourmaline can be |
| exceptional
capacity has to restore |
the
collectors, its dichroism very |
confused with the ruby by the |
| the
light thanks in particular to its |
marked
and its blue color saw it |
amateurs ). The etymology of |
| high
index of refraction, including in |
qualified
incorrectly water sapphire |
its name comes from Latin and |
| not
very enlightened condition. |
by
certain stone amateurs. |
means: (which draws on the |
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|
red). |
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