Thursday, July 9, 2026

What Is Black and Colored Gold?

Photo: Jewelry Point

The short answer is black gold and colored gold are alloys. They are made by mixing pure yellow gold with other metals. Pure 24k (100%) gold is too soft to wear as jewelry, so it is mixed with a percentage of other metals to strengthen it. Topically, jewelry is 18k (75% gold + 25% other metals), 14k (58.3% gold +41.7% other metals, or 10k gold (43.5% gold + 58.3% other metals). We are used to seeing alloys of yellow, silver, and rose gold, and I’ve written a prior post about them here. But did you know about black gold, green gold, blue gold, and purple gold?

Jewelers make black gold with special heating to create oxidation, or by mixing yellow gold with cobalt. Green gold is yellow gold combined with silver, copper, or cadmium. Blue gold is created by mixing yellow gold with indium or gallium, and purple gold is made by blending yellow gold with aluminum.

I’ve only seen yellow, white, and rose gold in jewelry stores, and I’ve never seen anyone wear the other colors of gold. Reportedly, black gold is having its day, and yet I’m not a fan.

To each his own, but what I love about jewelry is its shine and sparkle. Of course, what we like is what we’ve grown accustomed to seeing, so black, blue, green, or purple gold seem more like custom jewelry than real gold.

Nowadays, gold is so expensive, I’d be reluctant to splurge on what seems like novelty fine jewelry. What about you? Another jewelry lover might covet the uniqueness of black or colored gold.

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