The three series colors of diamonds include: Cape series, brown series and color series Cape series: including colorless, light yellow to yellow diamonds; Brown series: including brown diamonds with different strengths; Color series: including pink, purple, gold, blue, green and other diamonds. Pay special attention to yellow diamonds. Yellow diamonds are light yellow and golden yellow. In the process of diamond formation, when nitrogen atoms replace some carbon atoms in the diamond crystal (1000 out of every1000 million carbon atoms are replaced), it begins to absorb blue and purple light, thus making the diamond appear yellow. Blue diamonds: light blue and bright blue. In the process of diamond formation, a small amount of boron was absorbed, and the diamond was sky blue. Red diamonds: pink and red. In the process of diamond formation, the lattice structure is distorted, making the diamond appear red. Green diamonds: light green and bright green. The formation of green diamonds is due to the change of lattice structure by natural radiation. Black diamond: The formation of color is caused by black inclusions. Beware of fake yellow diamonds. Yellow diamond and yellow and white diamond are completely two concepts. Fake yellow diamonds are often dark yellow and light in color. If there is, the real yellow diamond emits bright yellow or yellow light close to gold, so you must go to the diamond jewelry store to buy diamonds. Don't confuse colored diamonds with yellow diamonds. Most gem-grade diamonds belong to Cape series, namely colorless-light yellow series. When identifying the color of diamonds, the identified diamonds are compared with a set of international standard colorimetric stones, and the colors of the standard colorimetric stones are arranged from colorless D (the highest grade) to yellow Z in turn. ..