Research & Medical Tourette Association Annual Scientific Meeting The Tourette Association of America will convene its annual scientific meeting on Thursday, April 20, 2017, at the Bethesda North...
Bort-like heavily twinned diamond from Congo. Bort or boart is a term used in the diamond industry to refer to shards of non-gem-grade/quality diamonds. In the manufacturing and heavy industries, bort is used to describe dark, imperfectly formed/crystallized diamonds of varying levels of opacity.
Carat is a unit of weight for gemstones. Karat refers to the purity of gold. On gold jewelry, the âPâ mark stands for âplumb.â Plumb is an old-fashioned term that simply means the purity level of the gold is precisely what is stamped on the labelâno more, no less.