Natural Gemstones: Reference Facts
Orange Sapphire
Sapphire is a member of the mineral corundum, which is one of the best gemstone groups for jewelry setting. Red corundum is known as ruby, and all corundum that is not red is called sapphire. Sapphire comes in a wide range of colors including blue, purple, pink, yellow, orange, green, white or colorless (sapphire colors other than blue are sometimes called fancy sapphires). Orange sapphire is available from yellowish orange to reddish orange. Orange sapphire has everything a precious stone should have: excellent hardness, magnificent color and exceptional brilliance. With all excellent qualities associated with this gemstone, orange sapphire is suitable for use in any kind of jewelry.
What makes orange sapphire so precious? The warm and fiery color combined with its brilliant fire has made orange sapphire so desirable by gemstone lovers and collectors; however, top-quality orange sapphire with really fine color and good clarity occurs very rarely in the world's mines.
Like all varieties of corundum, orange sapphire symbolizes truth, sincerity and loyalty. Orange sapphire also gives an expression to powerful feeling, passion and love.
| Orange Sapphire Known Facts
|
| Color |
Yellowish Orange, Orange, Reddish Orange |
| Clarity
|
Type II – usually eye clean with some inclusions under magnification |
| Crystal Structure
|
Trigonal
|
| Chemical Composition
|
Al2O3 – Aluminum oxide |
| Luster
|
Vitreous
|
| Optic Character
|
Doubly Refractive
|
| Durability
|
Excellent
|
| Specific Gravity(SG)
|
4
|
| Refractive Index(RI)
|
1.762-1.770
|
| Birefringence
|
0.008
|
| Hardness
|
9
|
| Occurrence
|
Madagascar, East Africa, Sri Lanka |
|
|