1, jade: there are two kinds of jade: soft and hard. Usually, jade refers to nephrite, which is a hydrous calcium magnesium silicate with hardness of 5, excellent toughness, translucent to opaque, fibrous crystal aggregate; Crystal: Crystal is a colorless and transparent large-scale timely crystal mineral.

2. From the structure of jade ornaments and diamonds, jade is composed of minerals and belongs to rocks; On the other hand, diamonds are minerals. As we all know, diamonds are hard, and the hardness is 10 degree Mohs, while jadeite is 7 degrees, which is lower than diamonds. When diamonds are put together with other jewels, they often leave scars on other jewels.

3. The most fundamental difference: jadeite polycrystalline mineral aggregate, single crystal plastid; Emerald is a polycrystalline high-grade jade, and crystal is a single-crystal low-grade gem; The chemical composition of jadeite is sodium aluminosilicate, and the chemical composition of crystal is silicon dioxide.

4. The difference between jadeite and diamond is: different hardness, different flaws and different structure. The hardness of jadeite is 5-7, while the hardness of diamond is 10, which is much higher than that of jadeite.