I am probably being dense but can anyone tell me the meaning of STL? It is on a certificate I have for a stone.
Oh and I have some very nice African sapphire, ruby, garnet, amethyst and emerald available (cut in Sri lanka not native cut).
a copy of the certificate may help to answer your question on STL Chris??
I believe it’s Semi Translucent
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.