where to authenticate natural pearls in UK

[matthew]

Dear Forum,

I am a new member who has a sizeable lot of loose undrilled natural pearls, I believe, from the Andamanan Sea in various shades of yellow, golden, and white. The sizes are between 12-20 grains in weight, very fine luster and water and are semi-round to baroque. First I would like them authenticated by ex-ray in the UK. I know that GIA has a pearl testing laboratory in New York that I have used on freshwater natural pearls once before but due to the value of these I would like if anyone knows which laboratory, if any, could do this in the UK?
Thank you
Matthew

 

[Zeide Erskine]

Hi Matthew,

You may want to ask Garrad in London (http://www.garrard.com/home.html).

Zeide

 

[matthew]

Thank you Zeide

Thank you Zeide

Dear Zeide,

Thank you for your reply, I will contact Garrad and see what can be done.
My best
Matthew