Gold Karat Purity Standard
        Karats            % Purity
          24                   100.00
          22                     91.84
          18                     75.15
          14                     58.48
          10                     41.81

Traditional Casting Grain Compositions
Yellow Gold . . . . Gold, copper, silver, zinc, and silicon
White Gold . . . . Gold, copper, nickel, zinc, deoxidants
Pink Gold . . . . Gold, copper, zinc, deoxidants

Weight Conversions
1 Troy oz = 31.1033 grams or 20 pennyweights (dwt)
1 oz Avoirdupois = 28.3495 grams or 0.9114 Troy oz.
1 pennyweight = 1.552 grams


Specific Gravities
24kt Yellow Gold . . . . 19.32
18kt Yellow Gold . . . . 15.58
14kt Yellow Gold . . . . 13.07
10kt Yellow Gold . . . . 11.57
Fine Silver . . . . . . . . .10.49
Sterling Silver . . . . . . 10.36

Traditional Birthstones
January. . . . Garnet
February . . . . Amethyst
March . . . . Bloodstone
April . . . . Diamond
May . . . . Emerald
June . . . .Moonstone, Alexandrite
July . . . . Ruby
August . . . . Sardonyx
September . . . . Sapphire
October . . . . Tourmaline
November . . . . Topaz, Citrine
December . . . . Blue Topaz, Lapus Lazuli