Specific-gravity of traditional gold alloy?

Hello all Could someone possibly post a formula for the calculating
of specific-gravity in gold alloys. I need to know the weight of this
traditional, [perhaps Nepali]‘so very beautiful’ alloy, which I use
for the bezels of all the delicate stones… its 93% gold/ 7%
copper. Thanks for all this ocean of knowledge. Love & Light

[Pune, India]