Red Sapphire
Natural Red sapphire
- Color: Red Sapphire is medium light to dark tones of red in color
- Origin: Srilanka, India, Burma, Madagascar, Africa
- Chemical Composition: Al2O3Corundum (Aluminium Oxide)
- Cut: Round
- Specific Gravity: 3.90 – 4.10
- Refractive Index: 1.759-1.778
- Hardness: 9
Formation
Corundum is found as a primary mineral in igneous rocks such as syenite, nepheline syenite, and pegmatite. Some of the world’s most important ruby and sapphire deposits are found where the gems have weathered from basalt flows and are now found in the downslope soils and sediments. Sapphire is colourless when pure trace amounts of various metals produce almost any color. Chromium produces red.
Birthstone
Sapphire is birthstone for September
Unusual Properties
Red Sapphire progress in self-awareness, realisation of truth and steady movement towards life path. It is a gemstone for success in competitive exams, for practitioners of medicine, agriculturists, politicians and government personnel.
Treatment
For heat treatment of fancy sapphires was used the high-temperature electric furnace with an induction heating element. Depending on the gem material and the targeted color of sapphires after treatment the different temperature regimes are specified, additionally (if required) a special gas environment is created by the use of selected reagents possessing different redox strength.
Usage
Pendants, rings and necklaces, studs or earrings and any other jewellery.
