3D hard gold is not a gold content, "3D" is an abbreviation of three-dimensional, meaning three-dimensional graphics. The purity of 3D hard gold is also pure gold, with a hardness of 97. It has the characteristics of high hardness and strong wear resistance. It effectively overcomes the shortcomings of traditional pure gold jewelry, such as low hardness, easy wear and difficult to maintain detailed patterns.

The world's largest cut diamond, a 555.55-carat black diamond, was sold for £3.16 million (about 27.2 million yuan) in an online auction on the 9th. The rare black diamond is believed to have originated from a meteorite or asteroid that struck Earth.

How to make your jewelry clear and shine forever? It is important to clean and maintain them after wearing them for a period.

Tridacna is a kind of shell of shellfish. The color is white. When you look carefully, there are parallel lines. The hardness of Tridacna is relatively low. You can't scratch the glass. When you encounter dilute hydrochloric acid, there will be bubbles.

On the premise of nature, experts use 4C to measure the value of gemstones, that is, Color, Clarity and Car-at. Generally, the impact of color on the value of gemstones is 50%, followed by clarity and size, and finally cutting. The order of the 4C value judgment criteria for ruby and diamond is different, but the principle remains the same, that is, the order and proportion are arranged according to the beauty and permanence of the gem and the rarity. As for rubies, not all rubies have collection value. We must choose rubies with good color, large particles, high purity and good fire color. Therefore, we can select ruby from color, clarity, fire color, weight, characteristic observation and certificate.

Each diamond has its contents. The quantity, size, shape and color of its contents will determine the clarity and quality of each diamond. Most of the diamond's contents cannot be identified by the naked eye. The less the contents, the more the light refracts, making it doubly bright.

The English name of ruby is Ruby, which comes from Latin and means red. It belongs to the corundum group minerals, and is a cubic crystal system. It is red to pink due to its chromium content, and the higher the content, the brighter the color. The blood-red ruby is most cherished by people, commonly known as "dove blood-red". Ruby and emerald, Jinshui Bodhi sapphire, tourmaline, etc. all belong to the colored gemstones.

Sapphire is a kind of corundum gem. The color of sapphire can be pink, yellow, green, white, or even multiple colors in the same stone. Sapphire jewelry is very popular because it symbolizes loyalty, faithfulness, love and honesty.

The lapis lazuli is dark blue, purple blue, sky blue, green blue, etc. Lapis lazuli can be used as both jade carving and jewelry.