Jewelry refers to precious stones or minerals with bright colors and high hardness, which can meet the requirements of jewelry after polishing and will not change under the action of atmosphere and chemicals.
Can be used as instrument bearings, abrasives, decorations, etc. It also refers to precious stones.
The meaning of aurora 23
In gemology, the concept of gem can be divided into broad sense and narrow sense.
In a broad sense, gemstones are indistinguishable from jade. Generally, gemstones refer to minerals or rocks with magnificent colors, hardness, durability and rarity, which can be polished and carved into jewelry and handicrafts, including natural and synthetic materials and some organic materials.
In a narrow sense, there are two concepts: gem and jade. Gem refers to the single crystal or double crystal with magnificent color, crystal clear, hard, durable and rare, which can be polished into gem jewelry, including natural and synthetic.
Such as diamonds and sapphires; Jade refers to mineral aggregates or rocks with magnificent colors, hardness, durability and rarity, which can be polished and carved into jewelry and handicrafts, such as jadeite, nephrite, dushan jade and jade, both natural and synthetic.
Jade also has a narrow sense and a broad sense. In a narrow sense, it only refers to jadeite, and in a broad sense, it includes a variety of minerals and rocks used for handicraft carving. As for colored stones, it means that the color and texture of marble are more beautiful and delicate, but the hardness is lower.
Low-grade arts and crafts stone, with weak luster, meets the requirements of processing technology. Some scholars advocate that colored stones should be included in the broad sense of jade, or that colored stones should be used as synonyms for jade for the time being.