After reading the second, understand: what is jewelry, what is a gem, what is jade!
What is jewellery, what is heyu, and what is stone? The basic concept of jewellery and jade 1. A generalized gem refers to all materials that have been honed or engraved to become jewelry or crafts. It includes natural and artificial gemstones. 2. Narrow gems refer to mineral single crystals produced by nature, which are beautiful, durable, rare and can be honed and carved into jewelry or crafts. 3. Jade refers to mineral aggregates produced by nature that are aesthetically pleasing, durable, rare and technologically valuable. Let's talk about jewelry from the four words of beads, treasure, jade and stone. One, beads In jewelry and jade, it refers to pearls. At present, the pearls on the market are basically cultured pearls. According to the different waters produced, they can be divided into freshwater pearls and seawater pearls. Second, the gem It refers to natural mineral crystals that can be used for jewelry and other purposes. It can be divided into high-grade gemstones and medium-low-grade gemstones by value. The world's five precious gems are: diamonds, rubies, sapphires, emeralds and gold emerald cat eyes. Other common middle and low grade stones include: topaz, crystal, tanzanite, tourmaline, garnet and more. Third, jade Jade is a multi-mineral collection. In China, stones that meet the three characteristics of beauty, durability and scarcity can be called jade. There are many kinds of jade produced or used in China, and the value of Hetian jade and jade is the highest. Fourth, stone The so-called "stone" often mentioned in jewelry generally refers to colored stones for carving, such as: Shoushan Stone, Qingtian Stone, Bahrain Stone, and so on. Stone and jade generally have lower hardness, and most Mohs hardness is between 2-4 degrees. Five, organic gemstones It refers to organic minerals or organic gemstones formed by the action of ancient creatures and modern organisms that meet the requirements of gemstones. Including: pearls, amber, ivory, coral, tortoise shells, etc. Face recognition is a biometric technology based on facial feature information.A series of related technologies,also known as portrait recognition and face recognition,that use cameras or cameras to collect images or video streams containing faces,and automatically detect and track faces in the images,and then perform face recognition on the detected faces.The recognition lens plays a significant role in the face recognition system. Recognition Lens,Digital Projection Lens,Distortion Recognition Lens,Optical Infrared Lens Dongguan Shengqiang Electronic Co.,Ltd , https://www.sqoptical.com
