(1) Curved surface type. Cabochon gems are also called plain or convex gemstones. The gemstone has a convex surface. According to the waist shape, it can be divided into: кръг, Овал, olive, pear, heart, квадрат, random, и т.н.. Като цяло, jade and jade, и т.н., are commonly curved, especially the oval ring or pendant surface, because it is […]
