I ædelstenshandlen, "karat" bruges ofte som kvalitetensenhed. Udtrykket karat, oprindeligt på græsk, betyder frø af en slags "johannesbrødtræ" der vokser ved Europas middelhavskyst. De gamle troede, at kvaliteten af hvert frø var den samme, so it was used as a weight [...]
Tag Arkiver: rosa guld armbånd
The cabochon type of gemstones is also called the body type or convex type. It consists of a polished arc-shaped top surface and a rough ground but not polished bottom surface. Its main feature is that the ornamental surface is a polished curved surface. Curved cuts are divided into three categories according to the top [...]