1, a rare variety. Shuangyashan is a veritable hometown of rubies. The most basic particle size of Shuangyashan ruby is 5 mm× 7 mm If this cutting work is good, the ruby with standard weight of 1ct is called "small particle", the ruby with weight of 1ct is called "medium particle" and the ruby with weight of 3-5ct is called "medium particle".

2. Value preservation. The price of ruby is relatively stable, and the price of ruby will not fluctuate with the change of environment, which is a stable rise and very valuable.