This Kashmir sapphire started as a 40ct rough crystal.
See photographs below before and after heating with scale.
Below left is preheat. Below right is postheat.
The finished product is thermally enhanced (heated)
to increase the depth of blue. I heated the stone in my
high temperature gas combustion furnaceThe treatment is
permanent and common to 99% of sapphire in the world today.
Heated Kashmir sapphire is rarely available in todays
market because there is no mining in Kashmir and little
remaining rough. We purchased rough from the J&K past
auction.
This hand carving shows excellent detail. Small
pockets of white kaolin can be seen. This kaolin clay
is exclusive to the Kashmir origin. The specimen is a
'one of kind' 16ct Kashmir sapphire.