Gm4
This is an alloy with 41,66 % gold.
"18K" should be stamped on the inside of a ring band or near the clasp of a bracelet or necklace if it is 18 karat gold. No stamp may mean it is custume jewelry or the stamp may be worn off. A jeweler can authenticate a piece for you if you are unsure.
If the bracelet is 15g gold and 5g silver, then the gold content is 15/20 or 75%. Pure gold is 24 carat, so 75% is 18 carat.
18 carat gold
9 carat
Go to a jewler...Another AnswerThe total carat weight is the total of all of the individual diamonds' weight in the bracelet. A certified gemologist can remove each stone, weigh it, certify it, and then replace it in the bracelet. You will pay a fee for these services.A jeweler may be able to measure the stones and estimate the carat weight of each, but the total will not be precise.
10 carat platinum.
It means the amount of gold.
750 means 75% puregold the balance of 25% are other metals such as copper and silver. Gold is measured in fractions of 24. As an example Pure gold is 24 parts out of 24 or [24/24=1=100%]. 18 Karat gold (18K) is 18 parts of pure gold out of 24 or 18/24=0.75 or the way it is stamped 750. Pure gold is very soft. The alloy or additives will harden the metal and change the color of the metal.
I would guess that it means 1 carat
it means your gold is of 22 carat purity
Turquoise is considered a precious gem and it ranges from a few cents a carat to over $50 a carat. An average grade with proper color and matrix ranges any where from $5 to $7 per carat.