To distinguish the two, we must first look at their respective physical properties. First of all, ruby belongs to corundum family, which has a tripartite crystal system, and its crystal morphology is often barrel-shaped, short column-shaped, plate-shaped and so on. The chemical composition of ruby is alumina, and it is red because it contains trace elements. Mohs hardness is 9 and relative density is 3.95-4.05.

The main component of South Agate is silicon dioxide, which is not as high as ruby, but its hardness is not low. Ordinary steel knives will not leave scratches on the surface. Due to the formation of South Red Agate and the special geographical conditions, South Red Agate is cracked, so most of the blocks are not big.

In addition to the above, we should also look at their color, texture, grain and inclusion, which is what we want to talk about.

1, color: Ruby is mainly divided into red, crimson, rose red, deep rose red and pigeon blood red (crimson); Common colors of southern red agate are persimmon yellow (orange red) and scarlet in Gansu.

Pink. There are also unusual purples.

2. Texture: Ruby has a very bright and smooth surface, while South Agate has a gelatinous texture. Even all red beads are not opaque, so we can see that the color is transparent and consistent from the inside out.

3, grain: Ruby has no grain, only South Agate has grain, and it is a half-moon weathered grain.

4. Inclusion: Ruby has characteristic inclusions, including filiform inclusions, zircon, spinel and fingerprint inclusions. In addition, there are mica, hematite, garnet, calcite and corundum inclusions. There is a phenomenon called "cobweb phenomenon" in the inclusions of south red agate, because south red agate retains a lot of substances from the surface.