Did Linde create the chatham and sell the idea?
No, Chatham is a flux process, Linde is hydrothermal and lacks the
beautiful (IMO) wispy, veil-like flux inclusions the Chathams have.
However, the Linde may have some interesting two-phase inclusions,
along with phenakite inclusions. For this reason, it's not
recommended that a gemologist attempt to separate them by inclusion
observation alone. At any rate, the Linde and Chatham synthetic
emeralds are markedly different.
Any info will help. These probably came from a purchase in the
eighties from a company called Goldmaster in the state of Florida
when this manufacturing company sold there business. There are so
many other questions I would like to ask, but this one seemed to
pop in my head first. Thanks
Actually, the Linde hydrothermals were last made (and may still be, I
don't know for certain) by a company named Regency and Biron.
Goldmaster may have sold them, but R&B had likely manufactured them.
With the advent of "soude" emeralds (synthetic spinel triplets) in
use as substitute birthstone materials, synthetic emeralds are
becoming less available. I'm still looking for a flux-grown emerald
with lots of veils to add to my gemological collection that won't
bite so deeply into my wallet.
James in SoFl