1, red diamonds are good. The hardness of jadeite is 5-7, while the hardness of diamond is 10, which is much higher than that of jadeite. The hardness of natural ruby is second only to that of diamond, and it will not be worn under normal circumstances. Even if it rubs against other gems, the ruby scratches other gems.

2. Diamonds are hard. As we all know, its hardness is 10 Mohs, and jadeite is 7 degrees, which is lower than diamond. When diamonds are put together with other jewels, they often leave scars on other jewels.

3. Hardness of jadeite: the hardness of 5-7 diamonds is 10, followed by that of ruby (jadeite) is 9, that of jadeite is about 5-7, and that of glass is about 2.

4, it must be jade! Diamond is just an ore. A rare ore is not as valuable as gold and jade. Gold, a generally long stone. Shiny, unbreakable for a thousand years. Jade, an advanced stone. Green inside and white inside will not be bad for thousands of years.

5, crystal: Mohs hardness 7, Mohs hardness, equivalent to a steel file as hard. Diamond: Mohs hardness 10, new Mohs hardness 15, microhardness 10000 kg/mm2, microhardness is 1000 times higher than that in time and 150 times higher than that in corundum.