Costume jewelry

A lot of the (gold) jewellery I find is 9ct (often marked as 375). It's very common in Australia.

Metalman47 said:

Found this costume jewelry heart locket. Think it's 8 or 9 karat gold plated. Didn't realize gold went that low on the karat scale. Was reading internet that said costume jewelry don't go above 10 karat.

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I've seen many "costume" jewelry pieces marked as gold plated in 14K and 18K too. How do know your locket is plated; and in 8 or 9K gold?

Is it 8 or 9 karat.

Dear farigist, I really don't know if it is 8 or 9 karat gold, I'm just guessing. I've used my electronic gold tester which is 10, 14, and 18 karat gold and that came back negative. Then I used a acid scratch stone and the lowest acid test said if the liquid desolves at 10 karat that it is lower then 10 karat. I was also reading on internet and it said costume jewelry never goes above 10 karat. I used a Walmart gold cleaning solution on the locket and it created spots on it where I could see silver underneath. So bottom line is I think it's 8 or 9 karat. By the way is there a way to test for 8 or 9 karat?? Thanks Justin