About Sapphires

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About Sapphires

Is the Birthstone for September and the star sign Libra.

Physical Properties

Sapphire chemical composition: Al2O3, color is due to trace impurities of Cr, Fe and Ti

Index of refraction: 1.757-1.778

Crystal system: hexagonal-rhombohedral, bar3 2/m.

Specific gravity: 3.98-4.10.

Hardness: 9

Sapphire History and Mythology

In earlier times, some people believed that the firmament was an enormous blue sapphire in which the Earth was embedded. Could there be a more apt image to describe the beauty of an immaculate sapphire? And yet this gem comes not in one but in all the blue shades of that firmament, from the deep blue of the evening sky to the shining mid-blue of a lovely summer’s day which casts its spell over us. However, this magnificent gemstone also comes in many other colours: not only in the transparent greyish-blue of a distant horizon but also in the gloriously colourful play of light in a sunset – in yellow, pink, orange and purple. Sapphires really are gems of the sky, although they are found in the hard ground of our ‘blue planet’.

Where Sapphires are Found

Sapphires, call them gemstones of the sky though we may, lie well hidden in just a few places, and first have to be brought to light through hard work. Sapphires are found in India, Burma, Ceylon, Thailand, Vietnam, Australia, Brazil and Africa. From the gemstone mines, the raw crystals are first taken to the cutting-centres where they are turned into sparkling gemstones by skilled hands. When cutting a sapphire, indeed, the cutter has to muster all his skill, for these gemstones are not only hard. Depending on the angle from which you look at them they also have different colours and intensities of colour. So it is the job of the cutter to orientate the raw crystals in such a way that the colour is brought out to its best advantage.

Sapphire and Loyalty

Blue is the main colour of the sapphire. Blue is also the favourite colour of some 50 per cent of all people, men and women alike. We associate this colour, strongly linked to the sapphire as it is, with feelings of sympathy and harmony, friendship and loyalty: feelings which belong to qualities that prove their worth in the long term – feelings in which it is not so much effervescent passion that is to the fore, but rather composure, mutual understanding and indestructible trust. Thus the blue of the sapphire has become a colour which fits in with everything that is constant and reliable. That is one of the reasons why women in many countries wish for a sapphire ring on their engagement. The sapphire symbolises loyalty, but at the same time it gives expression to people’s love and longing. Perhaps the most famous example of this blue is to be found in music, in George Gershwin’s “Rhapsody in Blue”. And the blue of the sapphire even appears where nothing at all counts except clear-sightedness and concentrated mental effort. The first computer which succeeded in defeating a world chess champion bore the remarkable name ‘Deep Blue’.

References

All information taken from the following sites:
Gemstone.org
Mineral Miners