Hello!
I've been here last year when I've just discovered fancy coloured diamonds
My fiance and I managed to find a lovely stone in the colour we wanted (it's brownish-orangy-pink, sort of like a salmon, nude

) and bought it from a reputable dealer (0.30ct, modified rectangular brilliant-cut with GIA cert of course). We talked to him about the setting: simple 4 claws, 18ct rose gold, size 5.5 and he told us it would be about £500.
We didn't have enough money to go for it straightaway so said we'll be back - that was in October 2010.
Now, we came back to set the diamond and he said it would be £970

basically double the price!
To be honest, I think he offered us this price because he noticed how excited we were to finally set our stone, after waiting for so long...But he said that it's because of the VAT increase (2.5% since last year...) and the price of gold is higher and that it's bespoke etc., etc.
Well, we're not specialists but it's a MASSIVE difference and we're both students

we're thinking of taking the stone to get it set with another jeweller - is it a good idea? what should we do, since he's not very willing to negotiate the price...