Let me first say [the safest method of identification]:
The testing certificate of the domestic authoritative professional jewelry appraisal agency. I can't understand it, I can't identify it. It is the safest way to ask the seller to provide a certificate. Of course, the authenticity and authority of the testing organization is also very important.
[Personal identification method]:
1. Look at white or yellow spots (calcite). The presence of white or yellow spots is basically considered a natural product. Note that it is not a pale blue marking. The boundary between white spots and blue should be obvious.
2. Look at the dark green diopside (visually as black), some lapis lazuli will have dark green diopside impurities, and the dyeing products are basically not, which is also the identification point.
3. Look at the dye deposition. Generally, the dyed product is very dark in the crack and may be dyed. But not absolutely, because there are also black lines/black lines in natural lapis lazuli.
4. Wipe the reagent, take a bead to be identified, use hot water for 10 minutes (remove the surface may interfere with the identified wax), wipe with acetone / nail water / alcohol, if it turns blue, it can be basically identified as dyeing .
[Note]: The statement that the rope is dyed blue is not reliable. The lapis lazuli is a dye itself, and the blue color on the rope may be the blue color of the processed powder present in the tunnel.
ã€price】:
High quality and low price are basically impossible. One point is worth the price. There is no leak detection.
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