Sensory identification and Tian Yu and similar jade
Going to the field to check "stone", or Taobao in the jade distribution center, when picking up a piece of pleasing items (ornaments), when it is happy, what it is, it becomes our most concerned issue. Just listening to the "Wang Po" next to the letter, it is not far from being deceived. At this time, it is obviously more important to identify by sensory means such as seeing and touching. The following small series talk about sensory identification and Tian Yu and similar jade experience.
Sensory Jianbao: Through the perception of the shape, color, transparency, luster, internal and external features, fracture, weight and other characteristics of the gemstone through eyesight, hand touch and other senses, there is a preliminary judgment on the gem property.
Note: You can use several portable tools, such as small flashlights, 10X magnifiers, knives, etc.
An item (ornament) - the first thing you see is color.
Hetian jade mainly has white, green, green, yellow, ink, sugar color, and white-green, white-ink, white-sugar and other transition colors, the color is relatively simple. If you see unusual colors (purple, blue, etc.) and multi-color (3 or more) accessories, be alert.
Second, Hetian jade is translucent to opaque, mostly micro-transparent and rarely translucent. It can be observed through the transparent and reflected light. Note: the light passing through the jewelry on the back side is transmitted light, and the light refracted by the front side ornament is reflected light.
Third, the gloss of Hetian jade is typical of grease luster. If you see glass luster, waxy luster, silky luster, etc., you must be alert.
Fourth, pay attention to the internal and external features of the item (ornament). The structure of Hetian jade is a felt-like structure and a fiber interweaving structure. If you see structures such as cryptocrystalline structure and granular shape, you must be alert.
When purchasing raw materials, pay attention to the shape of the fracture, that is, the shape of the fracture. The Hetian jade fracture is a staggered shape, while the glass and grape stone are shell-like fractures, and the quartzite and marble are granular fractures.
The fifth point, by weight, can also roughly determine whether it is Hetian jade. Under the same volume, the weight of the jewelry (hangings, bracelets, etc.), if Hetian jade (2.95g/cm3) feels moderate, then jade (3.34g/cm3), water calcium aluminum garnet (3.47g/cm3), The mountain stone (3.40g/cm3) and other hand weights, but jade jade (2.57g/cm3), quartz jade (2.65g/cm3), marble jade (2.70g/cm3), albite jade (2.63g/ Cm3) and so on.
On the sixth point, Hetian jade is tough, the needle and the knife are not scratched, and the jade and the marble are different. Note: The owner must agree with the owner before scribing, and the scoring part should be selected as if the item is not conspicuous.
In summary, the jade similar to Hetian jade mainly includes jade, Dushan jade, water calcium aluminum garnet, grape stone, Fushan stone, jade jade, albite jade, quartzite, marble, etc. Transparency, luster, observation of internal and external features, and weighting, scoring, etc., through sensory, can distinguish the difference between Hetian jade and similar gemstones.
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