What's the difference between a gem and a diamond?

Diamond is a kind of precious stone. The following are the definitions of diamonds and precious stones, refer to Baidu Encyclopedia. Definition of Gem: Gem is the most beautiful and valuable rock.

The difference between gems and diamonds is hardness, composition, value, clarity and refraction.

Single refraction of diamond The single refraction of diamond is determined by the essential characteristics of diamond. While other natural gemstones or artificial gem are mostly birefringent. When the fake diamond is observed with a magnifying glass of 10 times, it is easy to see that the edges and corners overlap, and two bottom lights are exposed at the same time from the slightly inclined front.

Diamonds are polished diamonds, also known as Jin Gangzuan, which usually refer to gem-grade diamonds, especially cut gem-grade diamonds. Diamonds are polished rough diamonds, while rough diamonds are colorless octahedral crystals. However, due to the geological influence of the region, diamond mines will have different colors and shapes.

Because the carbon atoms that make up a diamond are evenly arranged, its crystal is extremely perfect. Ruby and sapphire, also known as corundum, are mainly composed of alumina, and their colors are different because of the different contents of chromium, iron and titanium. Emerald is mainly composed of beryllium aluminum silicate, and the beautiful green color is mainly due to chromium and vanadium.