1. When choosing obsidian, it is best to choose black beads with bright colors and smooth beads. Because such obsidian is pure in texture, it is more meaningful to collect and wear it.

2. See if there are big or small rainbow eyes on the round beads, which show rainbow-like colors under strong light. Therefore, to buy black nephrite, we must first choose the depth of color.

3. Good quality obsidian can only vaguely see the rainbow eye. If you only see the obvious white eyes on the black beads, and the shaking beads have not changed, then it is worthless ordinary goods.

Extended data:

Obsidian can be processed into handicrafts. In addition, obsidian has the characteristics of glass, and its cross section is shell-shaped and very sharp. At present, most obsidian jewelry is produced in Central America and North America, and the national stone of Mexico is obsidian. China also produces obsidian, such as some places in Tibet.

In the process of formation, because the temperature around the lava flow drops rapidly and the cooling rate is the fastest, the magma containing silicon dioxide quickly condenses into blocks, and obsidian generally appears around the lava flow or near the seaside at the foot of the volcano.

At present, most obsidian jewelry is produced in Central America and North America, and the national stone of Mexico is obsidian. The formation of obsidian has its inevitability and contingency, because different natural conditions lead to different obsidian crystals, so according to the different appearance of obsidian.

Rainbow-eyed obsidian: Obsidian is the best in the moon-eyed obsidian, and naturally forms many color circles on the basis of the full moon cat's eye obsidian. The more colors, the rarer and the higher the value. There are even dozens of colors at most, so it is named rainbow-eyed obsidian. Rainbow-eyed obsidian is one of the most famous obsidian, named after its colorful round appearance.

As far as its value is concerned, the more colors of rainbow-eyed obsidian, the higher its value. Generally speaking, rainbow-eyed obsidian can be divided into two categories, one-eyed obsidian or binocular obsidian.

Ice-seeded rainbow-eyed obsidian: On the basis of ice-seeded obsidian, there are faintly visible colored eyes. Under normal circumstances, the crystal color is dark, and the dark brown ice obsidian may have colored eyes, which are not obvious and can only be seen under strong light.

Baidu Encyclopedia-Obsidian