Let's Talk about Geuda Sapphires (Sri Lanka)

[Ceylon Sapphires]

Could anyone with knowledge about Geuda sapphires, including information on heat treatments and varieties, please share their insights on this thread?

 

[LilAlex]

If this is a real account, welcome!

I have never seen them sold unheated (like those pizzas you can bake at home) and I have never seen a heated sapphire referred to as a former geuda. What is it that you want to know and that would not turn up in a web search?

Lang has this to say, which aligns with my understanding:

 

[Ceylon Sapphires]

If this is a real account, welcome!

I have never seen them sold unheated (like those pizzas you can bake at home) and I have never seen a heated sapphire referred to as a former geuda. What is it that you want to know and that would not turn up in a web search?

Lang has this to say, which aligns with my understanding:

Thanks for the reply!

I am looking for someone who has experienced knowledge of gem heat treatments.

 

[LilAlex]

Yes, there are whole books -- or certainly long chapters -- about heat treatment of sapphire. Temperature and time profiles, etc. Are you expecting someone to just write a whole bunch here without a specific question as a starting point? Then again, maybe you are a bot.

If not, you can start with Richard Hughes' books. Top one here is good. Over and out.