https://youtu.be/uurEwrSHpa0 Size Description - Bare stone size: about 1.1x1.6 cm (10.8 carats) Ring circumference: activity ring Net weight: about 10.43 grams Material Description- Swiss blue topaz, all ring made of 925 sterling silver, black part is specially treated with vulcanization. Q: What is the common "vulcanization treatment" of Nepalese jewelry? A: In fact, when silver jewelry turns black, "oxidation" is a common folk saying. Oxidation refers to the action of matter and oxygen, but the blackening of silver (ornament) is related to the "sulphur" in the air, so the surface of silver (ornament) Black substance (may be brown, light brown or dark brown or brown), which is "silver sulfide". Generally, silver (jewelry) will become black and tarnished if it is not well maintained, so the correct name should be "vulcanization", which is caused by hydrogen sulfide in the air or sulfur dioxide in the water, so it forms a vulcanization on the surface of silver (ornament). silver. Commodity contains - Ring, Kashmir handmade box, silver cloth, PVC jewelry storage bag ■ shipping instructions Nellie's products are shipped from Nepal, but in order to save the international shipping costs you spend, if your address is in an Asian country, we will order the order once a week, send the goods to the Taiwan studio, and then work with colleagues in Taiwan. Send the item to you. *If you are a buyer from China/Taiwan, please fill in your receipt information in Chinese in detail (Taiwan please provide the postal code 3+2) to avoid delays in delivery of goods due to language translation. **Taiwan customers want to use Super Merchants to pick up the pieces, you can link to the following items, make up the shipping fee! https://www.pinkoi.com/product/Sdae9brn ***Friends in Hong Kong and China, because Taiwan shipping is sent by postal system, if you want to use SF Express, you can also help us to fill some fees! https://www.pinkoi.com/product/MyrBxT4u Topaz Introduction (for reference only) 1. Topaz can be worn as amulet, can ward off evil, and make people eliminate sorrow and enhance confidence. Many countries in the world have set topaz as "the birthstone of November" and are known as the "stone of friendship." 2. Topaz symbolizes peace and friendship, Topaz can make friends and friends more friendly, especially Topa is still the commemorative jewel of the 16th anniversary of marriage, and it is also effective for strengthening the marital relationship. 3. Topaz also has many benefits for the human body. For the problem of eye diseases, as early as the eleventh century, topaz has been identified as having a therapeutic effect.