Description:

Use this handy guide to quickly calculate the true gold value of jewelry with simple arithmetic. Handy pocket size is perfect for when you're not at your computer!

No more guessing at percentages or overpaying for your scrap gold!

And here are some freebies from the first page:

MARKINGS
K, Karat
KP, Karat Plumb (exact amount of gold)
K.P., Karat Plate
GF, Gold Filled
GS, Gold Shell
GP, Gold Plated
GEP, Gold Electroplated
HGE, Heavy Gold Electroplate
Vermeil is sterling silver that is gold filled or gold plated.
Pave is a setting covered with tiny stones.

WEIGHT
31.10348 grams = 1 troy ounce (ozt)
1 troy ounce = 1.09714 avoirdupois ounce
28.3495 grams = 1 avoirdupois ounce
20 pennyweights = 1 troy ounce

Gold is measured in troy ounces, which are roughly 10% heavier than avoirdupois ounces.