| Sapphire
is in many respects one of the most
important of the colored stones.
Rubies and sapphires are more familiar
and cherished by layman than many
of the other gem varieties. With
a hardness of 9 on Moh's scale,
sapphires are extremely hard and
second only to diamonds in this
respect. Tough and durable, they
are suitable for use in any kind
of jewelry. |
| Gemological
Information |
| Color
: |
blue,
bluish purple, bluish violet, greenish
yellow, orangy yellow, purple, red,
reddish orange, red-orange or orange-red,
reddish purple, red-purple or purple-red,
slightly purplish red, violet, violetish
blue, yellow, yellowish orange, pink
|
| Refractive
Index: |
1.759-1.778 |
| Chemical
Composition: |
AL22O3 |
| Hardness: |
9 |
| Density: |
4.00 |
| Crystal
Group: |
Hexagonal |
| Ocurrence: |
Sri
Lanka, Burma, India, Kenya, Tanzania,
Madagascar, Thailand, U.S.A., China |
|
|
|
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