During Heating stones are put in furnaces in very high temperature and this alters the internal characteristics of a stone. Natural unheated stones internal characteristics are completely intact as made in earth’s crust for million of years & its colour and luster is completely natural whereas heated stones get their luster and colour artificially through furnaces.

When astrology evolved there were no treatments of precious stones known to mankind, the stones used were in there most natural form.

It is practically not possible to judge a gemstone through naked eyes. So one should opt for certified sealed gemstone and carefully check what the certificate says about the treatment/enhancement in the stone.

 The Rarity value of natural gems will tremendously shoot up in future.

If you come for selling a stone we will reexamine the stone and help you in selling it.

These are all unheated rare gems, usually we do not provide a service for that.

There are some treatments like irradiation that do not give the stone a permanent colour. The colour fade away as the stone is exposed to light and heat.

Yes, there are treatments which can give permanent colour and clarity to stones. These treatments are heating, beryllium diffusion etc.

It is rare of the rarest gemstones. Search on the internet or a market survey can be helpful.