It's worthless According to Douban's inquiry. Com, the price of ruby cut necklace is 5- 10 yuan gram, and the quality is 30-50 or1kloc-0/gram. The highest is 200-2000 yuan, which is worthless. Epidote is a rare stone species and the original stone of emerald. If it grows green and transparent, it will become an emerald seen in a jewelry store.