Question 180586
If the bracelet were 100% gold, it would weigh {{{Weight = Volume * grams/cc}}}
Using the info given in the problem, the volume is 15cc and gold weighs 19.3g/cc

Thus {{{Weight = 15 * 19.3}}} = {{{289.5}}} for a pure gold bracelet. This one is only 238. So it is 'less than 18k gold'