Meaning of STL?

Gem Related Discussion
1

Hi,
I am probably being dense but can anyone tell me the meaning of STL? It is on a certificate I have for a stone.
Thanks
Chris
Oh and I have some very nice African sapphire, ruby, garnet, amethyst and emerald available (cut in Sri lanka not native cut).

2

a copy of the certificate may help to answer your question on STL Chris??

3

I believe it’s Semi Translucent

4

Thank you, You are quite correct. After a lot of research i finally found it! It seems to be a lesser but becoming a more popular abbreviation.
Chris

5

Hello Chris!
I stay in Vienna, Austria. I am interested in untreated natural best Stones: Sapphires, colombian
Emeralds and if possible Burmese rubis, all VVS or better. If you want make an offer, pls do it.
Caprios1999@yahoo.de , Kurt Zalka

Best wishes,

Kurt