regular Reitz Diamond
Written by Administrator   
Monday, 29 October 2007

regular. The abbreviation for regular octahedron, the classic shape of a rough diamond.

Reitz diamond. See jubilee diamond,

rejection chip. A grading term used at the mines for a small misshapen diamond crystal or a broken piece of inferior quality.

rejection stone. (1) A grading term used at the mines for a diamond crystal that is inferior in quality rela­tive to a spotted stone, because il contains more inclusions. (2) Also a stone or stones of an assortment which is so poor that it is unsuitable for gem use. See spotted stone.