Emerald

With the development of society and economy, in addition to natural gemstones and artificial gemstones, the concept of jewelry should be expanded to include gold, silver, jewelry and so on. The industries that operate these items are collectively referred to as the "jewelery industry". "Jewelery" is much larger than the generalized "gem" concept. The broad gem refers to those raw materials that are suitable for pondering or carving for jewelry or handicrafts.