Zircon is a sub-stone of Diamond. It is called Tursava in Hindi and Hayasinth and Jesinth in english. Zircon sub-stone is an important sub-stone in itself and has its historical importance as well.
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Opal sub-stone is more famous by the name of Opal. In Sanskrit it is called Swagraj and in Hindi it is called Sagarraj. Normally Opal is colourless.
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