1) Purity: clear and transparent, no bubbles, no impurities, no defects. \x0d\　 (2) Cutting: Different cutting methods have different refractive effects, and the cutting is not good or even lacks luster. The biggest feature of Swarovski crystal is its advanced cutting technology. The more facets the crystal has, the more it shines and sparkles, giving it a diamond-like effect. Moreover, the cutting lines are sharp and the cutting facets are smooth without any fine lines. The particle sizes are absolutely equal, unlike ordinary crystal cutting lines that have a rounded feel. It feels dull. \x0d\　 (3) Color: A good crystal has pure color and shows a very obvious rainbow color under light or sunlight. \x0d\　 (4) Transparency: Swarovski crystal has a translucency that is unmatched by other ordinary crystals or natural crystals. \x0d\　 (5) Price: If the product price is lower than 40% off the counter price, it is obvious that it is a fake. \x0d\　 (6) The most direct way is to get it to a Swarovski counter for inspection or to Swarovski’s Shanghai branch. \x0d\　(7) All SWAROVSKI packaging is dark blue, which is the same color as his swan logo. From the outer box to the inner packaging, including the booklet, certificate and warranty card, they are all blue. \x0d\ (8) Jewelry box: Blue packaging box with a swan logo and the words SWAROVSKI written on it. \x0d\　 (9) When opening a jewelry box, you usually see the certificate first. The size of the certificate is based on the size of the jewelry. Changes, generally speaking, I buy a smaller and cheaper square box with a size of 55mm*55mm for 27 euros. If it is a necklace, it is a long box to hold the necklace. Relatively speaking, his certificate is the same as The box is about the same size. \x0d\　 (10) Certificates generally have multiple languages. I think most countries have them. Each text will be printed with the signature of Helmut Swarovski, and finally there will be the telephone numbers of all offices around the world. and address and Mail. \x0d\　 (11) Generally, small jewelry may be damaged during transportation. There will be a sponge gasket on the box, and the brooch will have a flannel-wrapped gasket, but the necklace has both front and back. The rubber band is fixed, so there is no spacer, but the box is very beautiful. \x0d\ (12) There will be a little swan logo on the back of the jewelry, including the tail of the rope, which is also wrapped in metal. It may be on the rope of a slightly cheaper necklace. There is no little swan logo, but generally if the price exceeds 1,000, the chain also has the swan logo, so some sellers tell you that anything that never has the swan logo is a profiteer, and what else is said about the boxes of things we bring back from abroad. If the packaging certificate is lost, it must be a profiteer, because without a certificate, there is no warranty certificate, and Swarovski promises a global warranty within 2 years (that is, if the item is bought in a foreign country, even if there is no invoice, as long as there is a warranty certificate, it can be shipped to other places around the world) Any counter warranty), more than 2 years, as long as you take it to its counter, it can be repaired, but it will cost some money. How much it will cost depends on the degree of damage.