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First time Gold Acid testing

Hey Guys!

First time here using acid testing for gold. So just wanna share my results and see what opinion you guys have.

Im recycling an old bracelet with the letters"HKH" Stamped on it, which should stand for an old danish goldsmith Henning Kaj Hansen. I see other vintage bracelets from same goldsmith wihch are most commonly sold online as 14 karat, so im pretty sure it’s legit, however no stamp number.

I put it up against my own sprue buttom where i know i’ve got exactly 14 karat gold in.


How do you read the results? 18 karat disolved both within 20 sec… When the acid drops for 8 & 14 karat were still there on both samples, they dident seem to dissolve. Only difference were that the Braclelet sample turned a bit redish and not as clear as my own gold sample.

From here I would say both were 14 karat gold, but then i washed the stone brick, blank spots were showing on all Karats on the bracelet, but not my own sample…

Perhaps i shouldent think too much about how it looks after i rinse, but only if it dissolves when the acid os on the stone?

And while we’re at it, other effecient ways to test this beside 15.000 $ + metal “gun” reading devices ?

Best regards

With the SG of 14 kt yellow being 13.07 and that of sterling silver being 10.36, you could easily do an SG measurement. Don’t bother with the sophisticated shelf over a scale, just weigh the chain suspended in water and then lying down on the bottom of the tared container with water in it. A simple way to get a rough SG. You can use light fishing line to secure the chain into a ball and suspend it, if needed. -royjohn