Unit of weight used for diamonds and gemstones. Approximately 1/5g.
Total Weight (tw)
Referring to the total weight of all gems or diamonds.
Diamond Total Weight (Dwt)
Used to separate diamond total weight from gem total weight if both are present.
Gem Total Weight (Gtw)
Used to separate gem total weight from diamond total weight if both are present.
Unit of measure commonly used for precious metals. Approximately 0.032Troy oz.
Troy Oz (Toz)
Troy oz is used for precious metals. Not the same as an Oz. 0.911458 Troy Ounces in one Ounce.
Karat (K or Kt)
Purity of gold in 24ths. 24K is pure gold. 14K is 14 24ths gold or 58.3%
(14/24=58.3). The industry standard for 14k is 58.5% pure.
Sterling Silver (925 or Strl)
92.5% or more silver content is needed to be considered Sterling Silver.
Platinum (Pt950, 950CO, 950IR,or 950RU, Pt900)
950 is 95.0% platinum content. Co= 5% Cobalt, IR= 5% Iridium, RU= 5% Ruthenium. 900 is 90% platinum with 10% Iridium