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Diamond clarity is the quality of diamonds that relates to the existence and visual appearance of internal characteristics of a diamond called inclusions, and surface defects, called blemishes. Clarity is one of the four Cs of diamond grading, the others being carat , color , and cut .
Diamond reports from GIA (as well as other, for-profit sources) are now demanded by most consumers purchasing diamonds over a certain size, typically for over 0.5 carat (100 mg), and almost always for over 1.0 carat (200 mg), and are considered an important tool in guaranteeing that a diamond is accurately represented to a potential buyer.
Diamond World News Service. June 7, 2008 "Diamond Certificates And Its Importance In The Industry". April 19, 2022; Simon, Bernard (June 27, 2002). "Adding Brand Names To Nameless Stones". Diamond New York Times "International Gemological Institute". Europa Star. April 1, 2002
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The state has more than one thousand major reservoirs, of which the largest two hundred have a combined capacity of over 41,000,000 acre-feet (51 km 3). [1] Most large reservoirs in California are located in the central and northern portions of the state, especially along the large and flood-prone rivers of the Central Valley .
Type II diamonds have very few if any nitrogen impurities. Pure (type IIa) diamond can be colored pink, red, or, brown owing to structural anomalies arising through plastic deformation during crystal growth; [20] these diamonds are rare (1.8% of gem diamonds), but constitute a large percentage of Australian diamonds. Type IIb diamonds, which ...
This is a list of countries by diamond production, ... 8.76: 8.7: 7.7 ... 20.9 Australia: 13.9 DR ...
Own work based on California Economic Strategy Panel Regions (PDF). California Labor Workforce and Development Agency (October 2006). Archived from the original on 2011-10-01. Retrieved on March 1, 2010. Author: Own work Based on File:California county map (labeled).svg by User:Thadius856: Other versions