Search results
Results from the WOW.Com Content Network
Diamond certified FL (flawless) by the GIA Two diamonds of grade VS 1 and SI 2 respectively. The GIA diamond grading scale is divided into six categories and eleven grades. [2] The clarity categories and grades are: [3] Flawless category (FL) diamonds have no inclusions or blemishes visible under 10× magnification. [3]
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.
This is a list of countries by diamond production, ... 8.76: 8.7: 7.7 ... 20.9 Australia: 13.9 DR ...
Toggle Southern California subsection. 2.1 Central Coast. 2.2 Desert Region. 2.3 Inland Southern California. 2.4 South Coast. 3 See also. Toggle the table of contents.
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
[7]: 7 Lassen Peak was the last Cascade volcano to erupt in California, from 1914 to 1921. Lassen is the most southerly active volcano of the Cascade chain. [8] This region is located in the northeastern section of the state bordering Oregon and Nevada, mostly north of the Central Valley and the Sierra Nevada mountain range.
Lonsdaleite (named in honour of Kathleen Lonsdale), also called hexagonal diamond in reference to the crystal structure, is an allotrope of carbon with a hexagonal lattice, as opposed to the cubical lattice of conventional diamond.
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 ...