1 and d represent the clarity of diamonds, which are colorless to yellow, and are divided into d, e, f, …, u, v, w and other color grades. Class d means completely colorless, with the highest color level and extremely rare.
2. Carat is the unit of mass (weight) of a gem, and 1 carat is equal to 0.2g or 200mg .. One carat is divided into100th minute, such as 50 minutes or 0.5 carat, which is used to calculate smaller gems.
3.pt950, where "pt" is the representative symbol of platinum, "950" is the platinum content of metal, and 950 is 95%, so pt950 diamond ring refers to a diamond ring containing 95% platinum and 5% other precious metals.
Extended data:
Maintenance of platinum diamond ring;
1. Avoid touching the surface of Pt950 platinum diamond with your hands or other skin, so as to avoid oil stains. It is best to wipe it with clean paper or oil-absorbing cosmetic paper. You can soak the diamond jewelry in alcohol every half a month or a month, and then rinse it with clear water.
2, avoid contact with chemicals when wearing, it is best to take off the necklace when taking a bath and washing your hair, so as to avoid the corrosion of chemical components in shower gel and shampoo. When dressing up, it's best to put on makeup and spray perfume before wearing it.
3. Store separately. Don't put the platinum diamond ring with other jewelry to avoid friction between jewelry, especially the platinum diamond ring should avoid contact with gold. After rubbing, gold will be polluted by platinum jewelry, which is difficult to clean.
Baidu encyclopedia -Pt950
Baidu encyclopedia -CT
Baidu encyclopedia-colored diamonds