I am really puzzled. I have some sterling silver earrings which I
want to patina using liver of sulfur. They are set with lab created
corundum ruby, saphires, and alexandrites.
One of the articles in the April 2014 Lapidary journal states that
when using LOS one should finish the piece, but"do not set any
Stones should be set after patination."
However, I read somewhere else that soft stones, such as lapis,
turquoise opal etc. should not be submerged in LOS, but that it was
safe to use LOS on lab created gemstones which have been made from
corundum and are not porous.
Before I dunk the earrings in the LOS I thought I had better check
with the experts on Orchid who have come to my aid so many times.