OK, let’s try this again–my answer went into a cloud.
There isa possiblity not yet mentioned–the milky stone is not a
natural diamond. There are stones coming into parcels that are lab
grown, fractured filled or faux. It could even be a CZ. The fact
that 3 out of 4 were fine and one wasn’t is curious. If all were
treated the same & one comes out frosted- then it can’t be the same
But if you missed with your flame angle, then it is a burned
diamond. In that case, as mentioned before–replace it. If it’s
large enough to re-polish, then do so. If it’s melee, put it into
the damaged pile and sell it for diamond dust. We always coat
diamonds with fire guard (alcohol & boric acid mix) and flux. If the
diamond goes milky–then I overheated it.
Jo-Ann Maggiora Donivan
P. S. Tante grazie to Hauman & Ton for making this forum happen !!
We truly appreciate all thehard work and dedication on a daily
basis. As president and part-time moderator for our neighborhood
Listserv–this task is definitely challenging on a good day. Imagine
doing it on a world platform with English as a second language.