There are two kinds of jadeite raw stones. There are several basic methods to identify the authenticity of jadeite raw stones.

For hundreds of years, jadeite is the only jadeite raw stone in the world known as "gambling stone". Jadeite raw stone - the jadeite raw stone to be processed, has beautiful colors and crystal clear features. It is a symbol of beauty and auspiciousness, and represents important cultural connotations. Whether it is jadeite raw stone or carved jadeite finished product, it is deeply sought after and keenly collected by thousands of households, manufacturers and collectors.

Anyone who has come into contact with jadeite raw stones knows that there are two types of jadeite raw stones. So, what are the basic methods for identifying the authenticity of jadeite raw stones?

There are two kinds of jade raw stones: mountain material and baby material.

Mountain materials are mined directly from the mountains. They are irregular in shape, have many edges and cracks, have a relatively rough and loose structure, and have no outer skin. They are not gambling stones. Zai material refers to the gravel of jadeite, which is the pebbles formed when the jadeite raw stone is broken by the force of crustal movement and rolls down the hillside and is carried into the ditch or river by floods or river water. It often has original skin or weathered skin on the outer layer, and because the jade inside cannot be seen, it is called gambling stone. Even today, with advanced science, there is still no instrument that can quickly determine whether the inside is precious jade or rags through the outer shell. Jade gravels come in different sizes, with those weighing tens or hundreds of kilograms to several tons being more common. The big ones can weigh thousands or even tens of thousands of tons, while the small ones can be as small as a thumb.

What are the basic methods for identifying the authenticity of jadeite raw stones?

Looking, weighing, photographing, carving, knocking, touching, burning, and testing are the basic methods for identifying genuine jadeite raw stones.

Look: Observe the external characteristics, texture, color, structure, cracks and later fillings of the original stone with the naked eye or by using a magnifying glass or microscope to identify the authenticity of the jadeite original stone.

Weigh: Use your hands or a tester to weigh something. Real raw stones are heavy, with a density above 3g/cm2, while fake raw stones are light, with a density below 3g/cm2.

Lighting: Under strong light or sunlight, use an opaque metal card or lamp to observe the color tone around and inside the skin, the direction of the green, the change in gloss, and the intensity of the reflection. The real raw stone has bright and natural color, clear green direction, strong luster, bright reflection, and a gradient relationship with the surrounding parts. The fake raw stone has gray and unnatural color, irregular green direction, weak luster, dark reflection, and a clear relationship with the surrounding parts.

Carve: Use a knife or hardness pen to scratch and measure its hardness. The surface of a genuine raw stone is dense and solid, with high hardness and a Mohs hardness of less than 1.1, and there is no sand falling off when it is carved. The surface of a fake raw stone is sparse, soft, and has a Mohs hardness of less than 1.1, and there is sand falling off when it is carved.

Knock: knock with a hard object to listen to the sound. Real raw stones have dense structure, are solid, and have crisp sounds, which are the same as the sounds around them. Fake raw stones have loose structure, and have dull sounds, which are different from the sounds around them.

Touch: Use your hands to feel and distinguish. The real raw stone feels smooth, and there is no peeling of the grains. The fake raw stone feels hard, and there is sand falling from the grains.

Burn: Burn on an electric stove, alcohol lamp or scald with boiling water. Real raw stones have no odor, do not smoke, and do not change color. Fake raw stones have odor, smoke, and change color.

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