Inorganic Gemstones

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Indicolite

Tumbled Indicolite Tourmaline

Dark blue tourmaline is known as indicolite or, occasionally, indigolite. Indicolite is usually heat-treated to lighten its colour and create a more appealing stone.

An essential source for indicolite is Siberia (Russia), where it happens in yellow clays formed from weathered granites. Fine, bright blue tourmaline has been present in Paraiba, Brazil. Other localities include Madagascar and the united states.

A lilac to violet-blue or reddish blue variety (first present in Russia) is called siberite.


Properties
Chemical Composition: 

Complex borosilicate

Crystal System / Forms: 

Trigonal

Hardness: 
7.5
Specific Gravity: 

3.06

Lustre: 
Vitreous
Refractive Index / Birefringence: 

1.62-1.64 / 0.018

Cuts & Uses: 

Step cut, mixed cut.

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In Germany, the garland of ambers is hung around the necks of the infants, so that their teeth might come out without much trouble.

In Turkey, people fix a piece of amber in the hubble-bubble, dogged by an age old belief that the presence of the jewel would destroy all the germs and no disease would spread, even after many have dragged their puffs from it.

In Greece, people think if wine is poured into the cups made of amethyst, one does not get drunk after drinking that.

In Rome, a talisman having coral pieces is considered very auspicious to quell the bad spells of evil look. The Romans were in the habit of hanging chains made of ancient coral pieces from the cradle of the infants to protect them from evil effects.

In China, people wear rings studded with tiny conch or oyster shells as they believe it cures all aches such as stomach ache, worms and like.

In India, pendants made of silver and studded with pearls are hung from the necks of the children to save them from any bad effects.

Greeks still believe, if women wear blue sapphires then no sense of immorality would pollute their mind nor can any fear of the supernatural can trouble them.

The Pope Innocent III had circulated an order asking all the priests wear blue sapphire, so that morality can be strengthened.

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It is believed that a turquoise gifted to a friend or a lover turns his or her life into one of happiness and good luck.

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