kansas city chiefs jersey cheap Benefits of Opal Gemstone
The name Opal comes from three sources. One is the Latin word “Opalus”. The second one is from the Greek word “Opalliois” which means a change of colour and finally from the ancient Sanskrit word “Upala” which means precious stone.
The gemstone Opal has been variously described. The great English poet Shakespeare called it the “Queen of Gems”. The Roman historian Pliny referred to it as a gemstone “having the fire of the carbuncle, the brilliant purple of the amethyst and the sea green colour of the emerald, all shining together in incredible union”.
The chemical composition of opal is hydrous silicate di oxide (SiO2 + nH2O). It specific gravity ranges between 1.98 and 2.20 and the refractive index ranges from 1.44 to 1.46. The hardness of the opal on the Mohs scale is generally between 5.5 and 6. The opal is mostly made up of silica and is a very delicate stone. It also contains a significant amount of water (usually between 3 and 10 per cent). In most cases, the gem is accompanied by fair amount of cristobalite. Most of the world’s opal production is mined in Australia, with Mexico being the nearest competitor.
Australia supplies more than 90 per cent of these gemstones to the world market. The main centers of production are Lightning Ridge in NSW and Coober Pedy and Andamooka in South Australia.
Less important centers are White Cliffs in far NW or NSW and WInton, Quilpie and Cunnamulla districts in Queensland and near Kalgoorlie in Western Australia.
Opals are Australia’s most valuable gemstone exports. The current Australian production figures for uncut gems vary between a$100 million and a$200 million. A large proportion of Australia’s rough opal is exported to Hong Kong, Japan, the United States and Germany.
Even though they are located in the desolate arid interior of the continent, the opal mining areas have become popular tourist attractions where visitors can try their luck at fossicking or purchase stones from the local miners.
Colour of Opal
Opal comes in both colour and colourless form. This kind of opal is said to displays a range of strong colours. In other words, it displays brilliant flashes of various colours in all its vibrancy by diffracting white light. This kind of opal has dark colour background and is hailed as an unbelievable gemstone. Another kind of coloured opal is white opal, with light background; the colour display is based on pastel hues. Then there is Crystal opal which has colourless background and refracts colour and allows light to pass through it.
Fire Opal with fair transparency may have background colour in any kind, that is, yellow or brown or orange or red. On certain occasions it has no colour background. This kind of opal is also called Mexican Opal.
Opal which is colourless, transparent or semi transparent and has no or little refraction of colour is referred to as jelly or water opal. White and Fire opals are much more common.
Benefits of Opal
A person whose birthstone is opal has a gentle and a humanitarian personality. His personality is full of colour and beauty, and he likes the company of others having the same characteristics as he or she. Such a personality is a die hard optimist with positive energy flow and loathes pessimists.
Opal is said to alleviate indigestion, stomach disorders and eye problems. The gemstone helps the wearer find happiness, love, good fortune and favour in the courts. Opal enables the wearer to foresee minor illness and this is indicated with the opal turning dull and grey. Opal turns sickly yellow when injury or accident is imminent.
Healing power of Opal
In medieval times Opal was considered to be a cure for diseases of the eye.
Fire Opal: Beneficial for red corpuscle blood disorders, depression, apathy, lethargy.
Black Opal: Beneficial for reproductive organs, spleen pancreas, filters red corpuscles aids white corpuscles; bone marrow; depression, especially sexual in origin.
White Opal: It is beneficial for balances left and right brain hemispheres for neuro stability; stimulates white corpuscles