diamond knowledge

What is a diamond?

What is a diamond?Diamond is an elemental crystal composed of carbon formed under the conditions of high pressure and high temperature deep in the earth.Beautiful and rare, diamonds are a symbol of love and fidelity, representing eternal and unbreakable love.Normaltan Jewelry would like ‘learning about diamond’ with you.

How to choose diamond?


The weight of a diamond is measured in carats, one carat is equal to 0.2 grams, and one carat is equal to 100 points. Due to the scarcity of diamonds, their price increases exponentially with weight.

weight of diamond
cleaness of diamond

Diamonds are minerals produced under the surface of the earth. The fewer the inclusions, the higher the clarity grade of the diamond, but this is also a mark exclusive to this diamond, and it is the best witness to identify the diamond.


Cut gives a diamond a second life, giving it the brilliance of fire. Appraisal agencies generally divide the cut into three levels: EX (Excellent), VG (Very Good), and G (Good).

cut of diamond
color of diamond


The color of diamonds is divided into D, E, F, G, H, I, and J from colorless to light yellow, and colorless is the best diamond color. According to the classification from colorless to light yellow, the D color is the highest level, the E color is the second and the next row.


Gem-quality diamonds, diamonds with more than 30 points will have certificates. The most authoritative is the GIA certificate issued by the Gemological Institute of America, which records all the information about the diamond. Another certificate is China’s NGTC certificate.

certificate of diamond


The fluorescence effect of a diamond is very important because it affects the color of the diamond. The fluorescence of diamonds is mostly blue, and 90% of diamonds have a slight yellowish tint. Under the influence of ultraviolet rays from sunlight, the combination of blue fluorescence and light yellow will make the diamond appear milky white.

How to Take Care of Your Diamonds

When the diamond ring jewelry is not worn for a long time, it must be cleaned in time before storage. Because of the strong lipophilicity of diamonds, it is easy to be stained with oil stains and become dull, so dust and oil stains accumulate in every corner of the diamond jewelry, seriously affecting its brilliance.

How to clean a diamond ring yourself? Normaltan Jewelry propose to take a bowl of warm water, add a few drops of neutral detergent to it, then use cotton (or a small brush, etc.) dipped in water to gently wipe the diamond jewelry. After the dirt is washed off, rinse it in another bowl of clean water, and then put it in a ventilated place to dry, and the diamond ring can restore its bright original appearance.

take care of jewelry