Diamond has high reflectivity, small critical angle of reflection, wide total reflection range, easy total reflection of light and large amount of reflected light, thus producing high brightness. When a diamond or light source moves relative to an observer, its surface reflects and flashes white light. Colorless, transparent and well-crystallized octahedral or curved diamonds can show good scintillation even without cutting and grinding.
Extended data
There are four "C" principles in selecting diamonds: cut, color, clarity and carat weight.
1, cutting
Cutting is the only human factor. A skilled diamond cutter can make a good diamond shine, and he can make the internal light reflect to the surface of the diamond to the greatest extent. Polishing technology will also affect the quality of diamonds. Perfect cut and symmetrical diamonds may reduce their value due to poor polishing.
Step 2 color
In some big jewelry stores, some diamonds are displayed for comparison. They arrange diamonds of various color grades in a row to help customers compare, because ordinary customers can't tell the color of diamonds with the naked eye. The color of diamonds is colorless as the top grade, and gradually comes second with the deepening of yellow.
Step 3 be pure
Generally speaking, defects determine the value of diamonds. More precisely, it depends on the impurity content in the drilled ore. Almost every diamond contains impurities, even the best quality diamond will have some defects. When its cleanliness is LC level, it can be regarded as flawless level.
4.carat
Carat is an important factor to measure the value of diamonds. The value of a 2-carat diamond with poor cutting technique, yellow color and defects is much lower than that of a perfectly cut, transparent and pure diamond. So the weight of a diamond is not the main factor that determines its value.
Baidu encyclopedia-diamond
Baidu encyclopedia-diamond ring