The Mohs hardness of diamond is 10, which is the hardest natural substance discovered by human beings so far. Compared with other precious stones, diamonds embedded in jewelry are more wear-resistant and scratch-resistant to various substances, so once they are owned, they can be passed down from generation to generation, because diamond jewelry never wears out and is often worn new.

2. Toughness

Diamond has high toughness, but its edge is fragile, so collision should be avoided when wearing it.

3. Specific gravity

The specific gravity of diamonds is 3.52g/cm3. The specific gravity of a diamond is greater than that of an ordinary gem, which means that its atoms are arranged more closely.

4. Thermal conductivity

Diamonds are known to have the strongest heat and conductivity, which makes them widely used in aviation industry and microelectronics industry.

5. Thermal expansion rate

The coefficient of thermal expansion of diamonds is very low, and there will be no obvious phenomenon of thermal expansion and cold contraction due to the change of temperature.

6. Refractive index

The refractive index of diamond is 2.4 17, which is the highest among all natural colorless gems, and makes light enter the diamond and converge towards the center.

7. Dispersion rate

Diamonds have a high dispersion rate of 0.044. This is also the best of all natural colorless gems. Diamonds have this property because they can disperse white light into spectral rainbow colors.

8. Notes

Gloss is related to refractive index, which is the characteristic of reflected light on the surface of an object. Diamond is a typical diamond luster, which makes the diamond have extremely dazzling luster after cutting and grinding.

9, lipophilic

Diamond surface is easy to produce oil and has strong lipophilicity.

10, reaction to chemicals

Diamond has high chemical stability, and acid, alkali and general chemicals have no influence on it.

Diamonds (gems)

Maintenance method

1. When you do housework, don't let the diamond you wear be contaminated with oil or bleach, oil will affect the luster of the diamond ornaments; Bleaching water stains metals.

2. It is not advisable to wear diamond ornaments for heavy work. Although the diamond is hard and wear-resistant, it may be damaged if it is hit hard according to its grain direction.

3. Never put the diamond ornaments and other jewelry together in the drawer or jewelry box, because the diamond will scratch other jewelry when rubbing. At the same time, platinum jewelry should not be worn with gold jewelry. Because gold is soft, if it rubs against each other, it will not only damage gold ornaments, but also dye gold on platinum, turning yellow and difficult to remove.

4. Platinum jewelry should be sent to the jewelry store for inspection every year to check whether diamonds and inserts are loose and worn, so as to repair them in time.

Diamonds are sticky to grease, and diamonds with skin grease, cosmetics and kitchen grease will lose their luster, so they should be cleaned once a month. The cleaning method is: immerse the platinum jewelry in the jewelry cleaning solution for about 5 minutes, take it out and brush the diamond lightly with a small toothbrush, then put it on the filter screen and wash it with water, and finally absorb the water with a soft cloth.

6. Don't hit the diamond ring: diamonds are the hardest thing in the world, but they are actually afraid of hitting. Because of its special molecular structure, it can carve traces on any gem, but it can't stand collision. Especially for "pointed inlaid" diamonds, the diamond waist is very fragile.

7. Care for the diamond ring: When doing heavy work, take off the diamond ring to avoid gravity deformation and affect the firmness of the diamond.

8. Maintenance of diamond ring, professional cleaning: diamonds are very lipophilic and easy to be contaminated with oil, so when washing dishes, you should apply hand cream and take off the diamond ornaments. You can't wear it while swimming. Chloride bleach in water will corrode diamond rings. It is recommended to choose professional jewelry cleaning agents and instruments for cleaning.

9. Maintain diamond rings and store them in categories: store different gems in categories to prevent jewelry from rubbing against each other.

(Source: Baidu Encyclopedia-Diamonds)