Crystal bracelet semi-finished DIY（All-purpose）

Natural crystals are clear and transparent, often containing cloud, star or flocculent gas-liquid inclusions, and often have micro-cracks. In addition, natural crystals have polarization, visible double crystal phenomenon, such as crystal spheres, from the top down, there will be double shadow phenomenon. Synthetic crystal or glass products, the body is uniformly pure, no cracks, and there are often small bubbles inside. The sphere is seen from the top down, and the double shadow of the line below is not visible. With feel identification, you can feel the proportion of synthetic crystal is greater than natural crystal; Natural crystal has a cool feeling, while glass has a warm feeling.