Sapphire deposits are found in Eastern Australia, Thailand, Sri Lanka, China, Vietnam, Madagascar, Greenland, East Africa, and in North America in mostly in Montana. Madagascar, Sri Lanka, and Kashmir produce large quantities of fine quality Sapphires for the world market. Sapphires are mined from alluvial deposits or from primary underground workings.
Also, Sapphire can be found as parti-colour, bi-colour or fancy colour. Australia is a main parti-colour Sapphire producer.
A star sapphire is a type of sapphire that exhibits a star-like phenomenon known as asterism.
Also, A rare variety of natural sapphire, known as colour-change sapphire, exhibits different colours in a different light.
Sapphires can be treated by several methods to enhance and improve their clarity and colour. A common method is done by heating the sapphires in furnaces to temperatures between 500 and 1,850 °C for several hours, or by heating in a nitrogen-deficient atmosphere oven for 1 week or more. Geuda is a form of the mineral corundum. Geuda is found primarily in Sri Lanka. It’s a semitransparent and milky appearance due to rutile inclusions. Geuda is used to improve its colour by heat treatment. Some geuda varieties turn to a blue colour after heat treatments and some turn to red after oxidizing. Also, Kowangu pushparaga turns to yellow sapphire after oxidizing.
Sapphire Crystal system is a Trigonal crystal system with a hexagonal scalenohedral crystal class. Sapphire hardness is 9 according to the Mohs hardness scale with 4.0~4.1 specific gravity.
Refractive index ω =1.768–1.772 nε =1.760–1.763 Solubility = Insoluble
Melting point = 2,030–2,050 °C
Birefringence = 0.008
Pleochroism = Strong
Luster = Vitreous
Sapphire is the birthstone for September and the gem of the 45th anniversary.
Healing Properties of Sapphire
Sapphire releases mental tension, depression, unwanted thoughts, and spiritual confusion. Sapphire is known as a “stone of Wisdom”. It is exceptional for calming and focusing the mind, allowing the release of mental tension and unwanted thoughts. Sapphire is also the best stone for awakening chakras. Dark Blue or Indigo Sapphire stimulates the Third Eye chakra. Blue Sapphire stimulates the Throat Chakra. Green sapphire stimulates Heart Chakra. Black Sapphire stimulates Base Chakra. White sapphire stimulates Crown Chakra. Yellow sapphire stimulates Solar Plexus Chakra
White Sapphire stimulates the Crown Chakra, located at the top of the head. When the Crown is in balance, our energies are in balance. White Sapphire clears the mind of negative thoughts and allows coming to new tasks with a fresh perspective. Physical Healing of White sapphire, it stimulates the pineal and pituitary glands and is useful in discovering alternate- or past-life influences in current illnesses.