Zaozhuang ruizhong gem crystal material Co., ltd is invested by yantai huajing gem Co, ltd. It is registerred into stock company in zaozhuang in April,2011.

advanced technicians are 8 persons , The major product is rough ruby #1,#2,#3,#5,#8, alexandrite, blue   corundum,white sapphire in half boules.yantai company was built in 1976 blue corundum,white sapphire in half boules.yantai company was built in 1976.

The quantity of an annual is about 200 tons, 60% of which are exported to India, South Korea,Pakistan, Japan,the United States,France,product quality and foreign exchange,with Outstanding products.