1.Citrine

Representative origin: Brazil.

Chemical formula: SiO2, belongs to the hexagonal crystal system, hardness: 7, specific gravity: 2.6, refractive index: 1.54-1.55.

2. Amethyst

Representative origin: Brazil, Uruguay, Argentina, Sambiya, South Africa, India, South Korea.

Chemical formula: SiO2, belongs to a hexagonal crystal system, hardness: 7, specific gravity: 2.65, refractive index: 1.54-1.55.

Characteristics: Its color is bright purple because it contains iron oxide, from light purple to dark purple.

3. White crystal

Representative origin: Brazil, the United States, Africa.

Chemical formula: SiO2, belongs to the hexagonal crystal system, hardness: 7, specific gravity: 2.6, refractive index: 1.54-1.55.

Features: White crystal is the most representative, most functional and widely used gemstone among the new era, and is known as the "Crystal King".

4. Pink crystal

Representative origin: Brazil, South Africa, Madagascar.

Chemical formula: SiO2, belongs to the hexagonal crystal system, hardness: 7, specific gravity: 2.6, refractive index: 1.54-1.55.

Features: Also known as hibiscus crystal

5. Garnet

Representative origin: India, Thailand, South Africa, Mozambique, Brazil.

Chemical formula: Mg3Al2(SiO4)3, belongs to an equiaxed crystal system, hardness: 6.5-7.5, specific gravity: 3.4-4.6, refractive index: 1.74-1.89.

Characteristics: Garnet is a large group. There are differences in color depending on the content of trace metals. Most of them are dark red, bright red, red orange, pink, green, etc.

6. Green Ghost

Representative origin: Brazil, Africa

Chemical formula: SiO2, belongs to the hexagonal crystal system, hardness: 7, specific gravity: 2.6, refractive index: 1.54-1.55

Features: Also known as green phantom crystal

7. Fajing

Representative origin: Brazil, Africa

Chemical formula: SiO2, belongs to a hexagonal crystal system, hardness: 2.6, specific gravity: 2.6, refractive index: 1.54-1.55.

8. Amber, beeswax

Representative origin: Baltic Sea

9. Red stone

Representative origin: Argentina, Peru, South Africa.

Chemical formula: MnCO3, belongs to a hexagonal crystal system, hardness: 3.5-4.5, specific gravity: 3.3-3.6, refractive index: 1.6-1.8.

Characteristics: Red-patterned stone, also known as Argentine stone or rhombic acid, is a pink color, delicate, cute and rare gem, and is a national gem of Argentina.

10. Tourmaline

Representative origin: The most famous tourmaline in the world is Brazil and the United States, among which the bright blue tourmaline found in Brazil is one of the most popular gemstones in the world; there are also a large number of gem-grade tourmalines produced in Sri Lanka, China, Myanmar, Madagascar, and Mozambique; Altai, Xinjiang, China also produces tourmaline gems of various colors, but generally the colors are lighter and fewer high-end ones. Most tourmalines produced in Yunnan, my country are also medium- and low-end gems.

Chemical formula: (Na,Li,Ca)(Fe2,Mg,Mn,Al)3A16[(OH)4|(BO3)3|Si6O18, belongs to a hexagonal crystal system, hardness: 7-7.5, specific gravity: 3.02-3.26, refractive index: 1.62-1.*.

11. Cleuria

Representative Origin: Brazil

12. Peridot

Representative origin: United States, St. John's Island, Red Sea, Hebei, Myanmar.

Chemical formula: (Mg,Fe)2[SiO4], belongs to orthogonal crystal system, hardness: 6.5-7, specific gravity: 3.27-4.2, refractive index: 1.65-1.70.

13.Agate

Representative origin: Brazil, Africa, the United States, India, Germany.

Characteristics: Chemical formula: SiO2, cryptocrystalline, hardness: 7, specific gravity: 2.60, refractive index: 1.54-1.55.

14. Aquarium

Representative origin: Brazil, Algeria, Australia, India, Xinjiang.

Chemical formula: Be3Al2Si6O16, belongs to a hexagonal crystal system, hardness: 7.5-8, specific gravity: 2.65-2.90, refractive index: 1.56-1.60.

15. Fluorite

Representative origin: United States, China

Characteristics: Chemical formula: CaF2, belongs to an equiaxed crystal system, hardness: 4, specific gravity: 3.1-3.3, refractive index: 1.43.

16. Lapis lazuli

Representative origin: Afghanistan, Chile, Myanmar, Russia.

Chemical formula: 3NaAlSiO2.Na2S, belongs to an equiaxed crystal system, hardness: 5-5.3, specific gravity: 2.38-2.42, refractive index: 1.50.

17. Moon Stone (Moon Stone)

Representative origin: Sri Lanka, Switzerland, Sweden, and the United States.

Chemical formula: NaAlSi3O6, belongs to the trisloping crystal system, hardness: 6, specific gravity: 2.53-2.56, refractive index: 1.52-1.57.

18. Obsidian

Representative origin: Mexico, Indonesia, Philippines, the United States, Australia.

Chemical formula: mainly silicon dioxide SiO2, but there are often other substances, so it has a large variation, and is a crystalless form, hardness: 5-5.5, specific gravity: 2.33-2.42, refractive index: 1.5.

19. Tea crystal (smoke crystal)

Representative origin: Brazil, the United States, Africa

Chemical formula: SiO2, belongs to the hexagonal crystal system, hardness: 7, specific gravity: 2.6, refractive index: 1.54-1.55.

20. Tiger Eye Stone

Representative Origin: South Africa

Chemical formula: SiO2, belongs to the hexagonal crystal system, hardness: 7, specific gravity: 2.6, refractive index: 1.54-1.55.

21. Dongling Jade

Representative origin: Brazil, India, Africa.

Chemical formula: SiO2, belongs to a hexagonal crystal system, hardness: 7, specific gravity: 2.65, refractive index: 1.54-1.55.

22. Titanium crystal, blonde crystal

Representative origin: Brazil, Africa

Chemical formula: SiO2, belongs to a hexagonal crystal system, hardness: 2.6, specific gravity: 2.6, refractive index: 1.54-1.55.

23. Jade pomegranate (green pomegranate)

Representative Origin: Brazil

24. Topaz

Representative origin: Brazil, Algeria

Chemical formula: Al2SiO4(F1OH)2, belongs to orthogonal crystal system, hardness: 8, specific gravity: 3.49, refractive index: 1.63-1.*.

25. Opal (OPAL)

Representative origin: Australia, Mexico, Peru, Brazil

Chemical formula: SiO2.NH2O, belongs to the cryptocrystalline system, hardness: 5.5-6.5, specific gravity: 1.98-2.5, refractive index: 1.44-1.46.

26. Czech meteorites

Representative origin: Czech Republic.

Chemical formula: mainly silicon and alumina, which is crystalless, hardness: 6-6.5, specific gravity: 2.34-2.39, refractive index: 1.492.

27. Shujulai Stone

Representative origin: South Africa, Japan, and the United States.

Chemical formula: (K’Na)(Na”Fe)2(Li,Fe)Si12O30, belongs to the orthogonal system, hardness: 6-6.5, specific gravity: 3.12.

Characteristics: Shujulai Stone is a rare and precious gem.

28. White crystal cluster

Representative origin: Brazil.

29. Amethyst Cave
To be continued...