No, first of all, we must correct an idea. Yu Hui is a natural jade, not a gem. Natural jewelry and jade can be divided into three categories: natural gem, natural jade and natural organic gem. The difference between them is that diamonds and sapphires are mineral crystals, natural jadeites are mineral aggregates and a few amorphous bodies, and organic gems include corals, pearls and opals. Therefore, the emblem jade should be called "jade" instead of "gem".