wholesale black onyx jewelry The authenticity of diamond diamonds in the whole city

blue sky jewelry wholesale 1. Touch it with your hands: Gently touch the diamond surface with your fingers, there will be a sticky feeling. This adhesive is unique to the real diamond.
2. Pin the pencil: wet the diamond water first, and then use a pencil to gently engraved. There is no trace on the crystal surface of the real diamond. If it is not diamond, it will be on the surface. Leave a trace.
3, touch the diamond with the tongue, cheeks, and back of the hand. The human body is constant temperature. If the test body is warm (heat conduction), it is a imitation product; the real diamond sticker is also cold (not easy to conduct heat).
4. To the test body, the condensed water mist is faster than volatilized on the imitation product (the passionality of the diamond is greater). Color: refers to the whiteness of diamonds, the best is 100 colors (also known as D color). The following are 99 colors, 98 colors, 97 colors, etc. (there are more 95 colors on the market). Huang, the lower the grade.
5, clarity: refers to whether the interior of the diamond is clean, the best is IF or FC. The common good on the market is VVS1, VVS2, VS1, VS2. The parcel will affect the "fire" of diamonds.
6, cutting: this is not what ordinary people can see, it is more troublesome to introduce.
7. Weight: The larger the weight, the higher the price. The weight of the diamond is very related to the price. As the weight increases, the price increases.
8. The main characteristics of diamonds are: excellent thermal guidance, high hardness, typical diamond luster, beautiful and soft color scattered, high refractive index, average body, sharp aspect interchange, standard craftsmanship Correspondence between diameter and weight. Therefore, the authenticity of diamonds generally starts from these angles.