Difference between revisions of "Carat"
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| + | [[File:SC297850.jpg|thumb|Borrich with over 19 carats of cut diamonds<br>MFA# 2013.1776]] | ||
[[File:2006.47-SC176532.jpg|thumb|Amethyst ring with 18kt gold<br>MFA# 2006.47]] | [[File:2006.47-SC176532.jpg|thumb|Amethyst ring with 18kt gold<br>MFA# 2006.47]] | ||
== Description == | == Description == | ||
Revision as of 14:46, 19 May 2022
Description
1) A unit of weight for gemstones. One carat is 200 milligrams. Carat was used in the middle ages by alchemists.
2) (usually spelled karat) A unit of measure for the purity of gold. Pure gold is 24 karat or 1000 fine. A gold alloy that contains 75% gold is 18 karat or 750 fine.
Synonyms and Related Terms
karat; Karat (Deut.); carat (Fr.); fine
Resources and Citations
- David C. Scott, Metallography and Microstructure of Ancient and Historic Metals, The Getty Conservation Institute, Los Angeles, 1991
- The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
- Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997