many gems and precious metals in the uk come from dodgy sources and are pretty untraceable india will be no differentEdited: 08 January 2013, 16:31
And any jeweller will just tell you what you want to hear. Blood diamonds!
On the basis that you will never truly know the source of the gem, the best thing is to just buy it. The only other suggestion is to contact NGO's who worry about such matters and ask them for a list of recommended sellers.
I agree with STALEXLiverpool, they'll tell you anything, but I've bought bargain stones there (diamonds, rubys and sapphires) from Rashid, who used to be in a tent on Majorda beach in front of the Aquarian shack. Had the stuff valued back in the UK and it's always been worth at least 3 times what I paid for it. Good quality too.
I'm not sure what information a certificated (e.g. GIA certificate) stone will give you - maybe it will give information about source of stome, maybe not.
Obviously, even if it did give the source, that wouldn't cover the metal.
nDon't rely on a verbal guarantee - as Stalex says, they can tell you anything they think you want to hear.
If I were serious about source of gemstones, I'd buy from somewhere that could really guarantee it.
Some places do, I'm not recommending this website - (and not NOT recommending it - IYSWIM - I just use it for reference), but they do say they have an audit trail back to each diamond's source to verify it's not a 'blood diamond':
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Getting a certificate is easy, they will print one with whatever you want on it while you wait however finding the colour stone in the quantity you want will take a bit longerEdited: 03 June 2013, 12:36
Should say quality not quantity, spell checker and operator error, sorry
I can't say that "ethically sourced" and "India" often appear in the same sentence!
may be ethically sourced in india but i think the meaning of the word may get distorted in translation