Why can ULGAI provide premium quality Crystal AB Rhinestones with even lower price than most vendors ULGAI has been specialized in manufacturing and processing crystals and rhinestones for more than ten years. No middle man, no mark up. We sell directly to you online. With low overhead and our direct manufacturing capacity we can offer customers higher quality rhinestones than most retails, and still sell it for a fraction of the price. How can I check the MATERIAL of ULGAI AB Crystal is not plastic Just burn it with a lighter Should I concern about the blackening and fading problems Will ULGAI Crystal Rhinestones keep shining and sparkling Whether will crystal ab rhinestones turn black or fade depends on the quality of raw material and the processing afterwards. ULGAI Crystal Gems are made from high quality K9 Glass which is pure, solid and transparent. Multifaceted surface and the coating outside are cut and processed delicately via sophisticated techniques, which aims to ensure durable sparkling. Besides, genuine gold or silver plating of flat or pointed back helps to enhance reflective brightness, which is incomparable by other low cost products. Usage Scenarios: 1. Crafts, 3D nail art, phone case decoration 2. Jewelry making, setting and embellishing of your clothes, shoes, purse, bags, etc. 3. Creations at scrapbook and other DIY craft works, home decor etc. Warm Tips: Glue is not included in the package.