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925 silver pendants wholesale Principles and categories of common gemstone classification

’' te gönderildi Kingjy tarafından

Since every gemstone has its own specific conditions of formation, chemical composition and internal structure, there is still no uniform classification scheme in the world. How to classify gems scientifically and reasonably is a topic of common concern in the international jewelry industry. Şu anda, countries around the world agree with the classification of gems based on their genesis. The Chinese gemstone classification standard (GB/I16552-2010) is also classified according to the origin of gemstones.

Common gems are classified as follows:

1. Doğal değerli taşlar

Natural gemstones are produced in nature and are beautiful, dayanıklı, ve nadiren. They can be processed into single crystals (may contain twin crystals) of minerals.

2. Doğal değerli taşlar

Natural jade refers to a collection of minerals with gem characteristics that are produced in nature, yani, a large number of fine-grained mineral crystal aggregates of the same kind, or a few are amorphous, yani, a small amount of other mineral crystals are mixed in it. The amorphous body. Genel olarak, the Mohs hardness is greater than 4, the texture is fine and moist, and the color is beautiful. Such as jade, beyaz yeşim, natural glass.

3. Natural organic substances

Natural organic gemstones refer to materials that are generated by natural organisms and composed of some or all organic matter and can be used for jewelry and accessories. Some come from animals or animal secretions or fossils, and some come from plant fossils. Such as ivory, mercan, kehribar, inci, tortoise shell, coal jade.

4. Synthetic stones

Synthetic gemstones are crystalline, amorphous or aggregates that are wholly or partly manufactured artificially and have known counterparts in nature. Its physical properties, chemical composition and crystal structure are basically the same as the corresponding natural gemstones. Such as synthetic diamond, synthetic ruby, synthetic sapphire, synthetic crystal.

5. Artificial stones

Artificial gems are crystalline, amorphous or aggregates that are manufactured artificially and have no known counterparts in nature. Such as plastic, artificial glass, artificial yttrium aluminum garnet.

6. Composite stones

Assembled gemstones are jewels and jade stones that are artificially assembled from two or more pieces of materials and give an overall impression. Örneğin “split Opal” and so on.

7. Reconstructed stones

Reconstituted gemstones are made by artificial means to fuse or press pieces of natural gemstones and jade into a gemstone with an overall appearance, such as reconstituted turquoise and reconstituted amber.

8. Imitation stones

Imitation gemstones are gemstones or other materials used to imitate the appearance characteristics of a certain natural gemstone, such as the color and special optical effects. Imitation gems do not represent a specific category of jewelry and jade.

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