A relatively rare gemstone, although it has become cheaper and easier to obtain in recent years. This is unusual for a gemstone, and is presumably the result of recent large deposits having been discovered.
When used in Victorian jewellery it was known as water sapphire, and also goes under the name cordierite. It is also unusual because it is pleochroic, which means it can display more than one colour - being able to polarise light. It can be distinctly brownish when viewed in one direction, and a violet- blue in another and pale blue in yet another.
Mainly found in Burma, Sri Lanka, Brazil, India and the Republic of Malagasy
Magnesium Aluminium Silicate
in gold and Iolite:
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