I thought I would share some things I’ve learned about green gold. When using green gold, use 14K not 18K. Why? Well let me ask you this, what is everyone’s big concern with green gold? Of coarse it’s hardness. I’ve learned you need ~ 5% Cu to get a nice hard alloy. If you use 18K and add 5% Cu you’ll end up with a greenish colour but it’s certainly not green. At 14K it’s still very green with 5% copper. The colour of this 14K with 5% copper is much cooler toned than yellow gold and looks like a nice yellow-green colour. Quite strong.
Here’s a picture of the 14K green.