What's the difference between ruby and red ochre?

The effect is different. Bianshi can be used to make medical devices, and has the effects of promoting qi circulation, promoting blood circulation, removing blood stasis, relaxing muscles and activating collaterals, etc. The inkstone made of red stone can be used to grind ink, which has the characteristics of smoothness, no ink rejection and astringency without sticking to the pen. HongLing is a very rare stone, and its stock on the earth is relatively small, so the handicrafts made of this material are very precious.