Found this interesting to me article it starts with a formula for gold lustre glass
It seems that Arthur's son also had a bit of a problem with Tiffany to say the least.
What I've read so far indicates at least to me that Nash has perfected and modified well known formulas or used more scientific means to get the desired results but is also not the mega genius his son portrayed him to be.
"Tiffany had been experimenting with glass since the early 1870s. Tiffany
and John LaFarge, along with others, attempted to produce glass that came in a
wide range of brilliant colours, and incorporated the leading as a part of the
design. This opalescent glass, which used metal oxides as a colourant, was a
centuries old technique lost to most glass manufacturers who instead used coloured enamels fused in place" from An Investigation Into Louis Comfort Tiffany's and
Tiffany Studios' Architectural Metalwork by Paula Kristina Kulpa
The Americans are not alone in that the brits are just as bad in that regard everything was either invented by a brit or an american.