Charles, there are some micro-alloys that people have been playing
with. Titanium being one of them, as I recall. Very, very low
percentages, well under 1%, IIRC. Other than knowing that people are
playing with them, I don’t know much about them, but I’d suspect Jim
After realizing I knew next to nothing about microalloys beyond
their existence, I did a little googling, and discovered two things:
A product PR site for a “24K” micro alloy that claims to be as
strong as 18K, but still hallmark-able at 24K. (Because 24K (in the
US) has a slop factor down to.997, and this stuff is.9985.
(“PureGold”. Google it.) Claims to be age hardenable to 110
Also found a commercial jewelry info sheet on microalloys, here:
No real relation to the OP’s question, but interesting knowledge
PS. > So far as I know, all the micro-alloys are 24K butter yellow.
That’s sort of the point. Butter yellow, and strong enough to
actually do something with.
PPS. > I’ve always fancied a 48Kt purple, but that’s just me…
PPPS. > My very first jewelry tutor did some messing about with
purple gold when it was first ‘invented’. Nasty, evil stuff.
Couldn’t do anything with it, but lord was it a pretty color. I’ve
always wanted to be able to get that color in some sort of useful