Broadly speaking, gems are the most beautiful, precious and rare stones.

It includes precious stones and jade in a narrow sense.

In a narrow sense, gems refer to single crystal minerals of natural elements (such as natural gold and diamonds) or compounds (such as crystals and rubies and sapphires).

Jadeite refers to polycrystalline rock composed of a single mineral or multiple minerals.

Second, what is jade?

Jade is known as the king of jade, and it is the jade in jade. Its chemical composition is sodium aluminosilicate, and its mineral composition is pyroxene, mainly jadeite. Its structure is a dense and massive aggregate composed of countless fine fibrous microcrystals, which has a blanket structure. Very tough, able to withstand high impact and pressure, and its products are durable. The hardness of jadeite is Mohs 6.5-7, and the specific gravity is 3.3. It is glassy or pearl-shaped, often translucent, and a few are transparent (completely transparent, called "glass part"), and the fracture is serrated. In the gemstone industry in China, there is a saying that yellow is Fei and green is Cui. The origin of jadeite jade is mainly concentrated in the Meng Gong area of Myitkyina in northern Myanmar.

3. What is Hetian jade?

Hotan jade refers to the oldest nephrite produced in Hotan, Xinjiang. Its chemical composition is calcium magnesium silicate, and its mineral composition is a special aggregate composed of amphibole. The Mohs hardness is 6-6.5, the specific gravity is 2.9-3. 1, the fracture is uneven, the oil is shiny, translucent to opaque, and the colors are white, blue, yellow, black and red. A piece of material is generally uniform in color, stable in chemical composition and resistant to strong acid and alkali. It is generally used to make jade carvings and various small pendants and bracelets. It is also our country.

Fourth, what is Xiuyu?

Xiuyan County, Liaoning Province is the main producing area of xiuyan jade, and it is also produced in Xinyi, Guangdong and Huili, Sichuan. The chemical composition of xiuyan jade is hydrated magnesium silicate, and the mineral composition is a collection of serpentine minerals. It is composed of fine fibrous and foliated serpentine crystals, which is a very fine and dense block. Its colors are varied, and light green and yellow-green are not common. Its hardness is 2.5-4.5, its specific gravity is about 2.5, and it is oily or waxy. Translucent to opaque, a few are transparent, similar to plexiglass. Jade is a low-grade jade material because of its low hardness and output. Commonly used as ornaments, jade carvings and various small pendants, as well as tea sets, wine sets, fitness balls, jade pillows and other daily necessities.

Verb (short for verb) What is dushan jade?

Dushan jade is named after Dushan, 8 kilometers northeast of Nanyang. Its mineral composition is plagioclase from zoisite, which belongs to polychromatic jade. Bright color, complete patterns, both depth and depth, delicate texture, dense and hard. Mohs hardness 6-6.5, specific gravity 2.9; Glass luster or grease luster, opaque or slightly transparent. Dushan jade is often used as jade carving for various ornaments in the market.