Just wipe it clean and put it away when you're not wearing it. Do not put it with too hard metal to avoid damaging the polished surface. It's not nice to go to the jewelry store for polishing. It costs money to distinguish 1. Specific gravity: too light must be fake, so that imitations such as glass, plastic and acrylic can be excluded. However, there are many crystals on the market now, the weight of which is similar to that of rock crystal. It is not easy to find them by hand. Some special ones with relatively large specific gravity (heavier than crystal) belong to purplish lead glass. 2. Look at the crystal: If there are bubbles in it, it must be glass (melted crystal). Those with growth lines must be cultured crystals. And the one with glue and cotton is definitely crystal stone. 3. Look at the color: Now both molten crystals and artificial crystals can be colored, and the colors that can be added can already be confused with the real ones. Therefore, if you want to distinguish between true and false, it depends on whether purple is naturally attached to the crystal. When you look at the real natural amethyst in the morning and at sunset, you will find that there are 2 color systems! 4. Price: Generally, the price of molten crystal is the lowest, followed by artificial crystal, and the highest is rock crystal. Generally, 8 yuan of natural amethyst with better color is about one gram, and the best amethyst can reach 40-60 yuan. 5. Feel: It feels cold, the feel of rock crystal is basically the same as that of cultured crystal, and the melted crystal feels almost like glass. 6. Inclusions: crystals with inclusions will never be fake crystals, so you can buy crystals with inclusions such as hair crystals and ghost images with absolute confidence, because counterfeiting such things is both costly and laborious, and the effect is easy to see through. 7. Generally, there will be cotton or ice cracks in rock crystals, but there may be bubbles in synthetic crystals or glass, and there will be growth lines in cultured crystals. 8. Color difference: Crystal has color difference, so it is impossible for every part of a crystal to have a uniform color, such as topaz, which is rare in the market. Natural topaz can be identified by putting it in water. Natural topaz is uneven in color in water. Usually one color radiates to the whole crystal, which is yellow, so the crystal color is absolutely uniform. According to experts, the evaluation of amethyst value mainly depends on four aspects: first, quantity. The less the quantity, the better. Two: clarity: the purer the crystal ball and jewelry, the better. Decorative crystals need inclusions. Three: bag body: integrity, image, bright colors and clear meaning are the top grades. Technology: Modeling requires a coordinated proportion, clear priorities, vivid images, polished and bright, and no scratches.