(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: tròn, hình bầu dục, olive, pear, heart, quảng trường, random, vân vân. Nói chung là, jade and jade, vân vân., are commonly curved, especially the oval ring or pendant surface, because it is […]
