Gem Grade Topaz Ring Nepalese Handmade 925 Sterling Silver

https://youtu.be/uurEwrSHpa0 *The goods are already in Taiwan, 1-2 days after the order is placed, the Taiwan post will be sent. Size description- Loose stone size: about 1.1x1.6 cm (10.8 carats) Ring Wai: Activity Ring Wai Net weight: about 10.43 grams Material Description- Swiss blue topaz, the whole ring is made of 925 sterling silver, and the black part is specially treated with vulcanization. Q: What is the common "vulcanization treatment" in Nepal jewelry? A: Actually, when silver jewelry turns black, "oxidation" is a general folk saying. Oxidation refers to the interaction of substances with oxygen, but the blackening of silver (jewelry) is related to the "sulfur" in the air, so the surface of silver (jewelry) The black substance (may be brown, light brown or dark brown or brown), this is "silver sulfide". Generally silver (jewelry) will turn black and lose its luster if it is not properly maintained, so the correct name should be "sulfide", which is the reaction of hydrogen sulfide in the air or sulfur dioxide in water, so sulfide is formed on the surface of silver (jewelry) silver. Product contains- Ring, Kashmir handmade box, silver cloth, PVC jewelry storage bag