China is one of the major producers of turquoise. Turquoise is produced in Zhushan County, Yunxi County, Anhui Ma’anshan, Shaanxi Baihe, Xichuan, Henan, Hami, Xinjiang, Wulan, Qinghai and other places.
Garnet, called ziyawu or ziyawu in ancient China, is a group of minerals that have been used as gemstones and abrasives in the bronze age. The common garnet is red. Garnet English “garnet” comes from Latin “granatus” (grain), which may come from “Punica granatum” (pomegranate). It is a plant with red seeds, and its shape, size and color are similar to some garnet crystals.
Yellow sapphire is also known as topaz in business. A variety of yellow gem grade corundum. The color ranges from light yellow to canary yellow, golden yellow, honey yellow and light brown yellow, with golden yellow being the best. Yellow is generally associated with the presence of iron oxide.
Aquamarine quality is evaluated from color, clarity, cut and weight. Pure color, no gray, no dichroism, thick and bright color of the highest value. Some aquamarine with directional inclusions can be processed into cat’s eye effect or starlight effect, and aquamarine with special optical effect is more expensive. Aquamarine with the same color, clarity and cut is more valuable if it weighs more.