Our factory iis a manufacturer with many years of synthetic gemstone producing experience, skillful workers and advanced producing equipments. Our factory locates in xinjinag city which is honored as the capital of gemstones in China. Our products include Crystal Citrine yellow crystal chemical formula SiO2 six crystal hardness 7 share index 1.54-1.55 2.60 The available sizes vary from 1.00mm to 100mm. Our products sell well in China and overseas. We are sure that our high quality and great service will meet your satisfaction. Please do not hesitate to contact us if you feel free. We will serve you heart and soul. You are warmly welcome to place a trial order.