定義

• Carat.  Measurement for gems. Not to be confused with karat (a measure for gold in America); also measurements and weights in the appendix.

  excerpted with permission from

  An Encyclopedia of Coin and Medal Technology

  For Artists, Makers, Collectors and Curators

  COMPILED AND WRITTEN BY D. WAYNE JOHNSON

  Roger W. Burdette, Editor

人际关系