Thanks for that David. I was pretty sure that "cape" diamonds and not the chocolates (as most people think of when the term "brown" is used) were used in the irradiation process.Date: 4/7/2009 4:26:27 PM
Nice set ups Gary!!
I''ve just spoken the company that treated the stones I posted.
To end up with a blue, you do need to start with a brown- the lighter the untreated stone, the lighter the blue after radiation.
LD- You are correct, they do irradiate ''cape'' diamonds as well- they turn orange and deep yellow. Stones used for these colors would include yellowish stones - M-N-O-P Q-R colors and the like.
It would not make sense to irradiate a fine white diamond, as there a cap on the price people will pay for a treated stone.
For example- there is a 4 carat blue- the same color as the pear shape I posted.
It would go for about $6000 per carat- a very low price for a 4carat round.
If it was a lighter blue it might go for about $8000 per carat. Again, this is less than say a J/Si1 might go for- maybe that''s the range of about L/VS.
The difference in price of the untreated diamonds would be indicative of the difference in price between a dark brown and a lighter brown diamond- lighter browns generally go for higher prices that dark browns.
From what I see here in NYC, the ones I''ve are posted considered ''Higher end'' treated stones.
The natural blue diamonds have a completely different type of brilliance.Date: 4/7/2009 7:29:14 PM
If i could get an irridated diamond that's the same blue as asscher you posted David, I'd jump on it! That's a gorgeous color!