Recently, Xiamen University presented a diamond ring to the freshmen of Physics Department of Qiangji Planning College. It is reported that this "diamond ring" is made of Mosan stone, the brightest gem in the world, and its hardness is second only to diamond. However, in the eyes of Xiamen University professors, Mo Sanshi is actually silicon carbide, which is a cutting-edge scientific and technological achievement in the semiconductor industry.

Properties and colors of Mosang stone: colorless, blue, green, yellow-green, yellow; Crystal system: hexagonal crystal system

Hardness: 9.25

Gloss: glass, sub-metallic luster

Stripe: gray-green

Transparency: transparent to opaque

Density: 3.218-3.22g/cm?

Common ring materials The common ring materials on the market include gold, 925 silver, K gold, platinum and so on. Besides, there are some special ring materials, such as titanium and stainless steel.

Among the common diamond ring materials, platinum is the most precious and rare, and it is deeply loved by people because of its pure and impurity-free characteristics. Making a ring symbolizes that love is eternal because of purity.

K gold is also one of the most common diamond ring materials. K gold is different from other ring metals, it is an alloy of gold and other metals, and it can also be called impure gold. There are many colors such as K white, K yellow and rose gold.

Gold is a traditional jewelry material, which has been made into rings, earrings, necklaces and other jewelry since ancient times, and is deeply loved by all walks of life.

Among the common ring materials, 925 silver is the cheapest one, but parity does not mean low grade, but gives the ring some simple love.