Diamonds are the hardest natural substance in the world. Since ancient times, people have used diamonds to symbolize men's strength and perseverance. When Pangu first opened hundreds of millions of years ago, diamonds were deeply hidden in the earth's crust, and they are still the hardest and lasting treasure in nature. It is precisely because diamonds can still shine after thousands of years that they have won the reputation of "eternity" and become a symbol of today's "eternal love".
Ruby's English name is Ruby, which comes from Latin and means red. It belongs to corundum group minerals and has a tripartite crystal system. Because it contains chromium, it is red to pink. The higher the content, the brighter the color. Blood-red rubies are most cherished by people, commonly known as "pigeon blood red". Before the Middle Ages, all red gems were called rubies because of the underdeveloped scientific knowledge of gems. In ancient India, people believed that there was eternal fire in rubies. In the past, there was a tradition in the west that red gem ring was worn on the left hand, which showed that people were kind in nature, calm in heart and able to resist the temptation from outside.
Sapphire is the general name of corundum gemstones with other colors except ruby, and its main component is alumina. Blue sapphire is caused by a small amount of titanium (Ti) and iron (Fe) impurities. Sapphire can be pink, yellow, green, white, or even multiple colors in the same stone.
Emerald, the mineral name is beryl. Because its crystal structure contains chromium and vanadium elements, it presents a pure and beautiful green color and is regarded as a treasure among gems. Emerald, known as the king of emeralds, is a very precious gem and one of the precious gems recognized by the international jewelry industry. Because of its unique green color, unique charm and magical legend, it is deeply favored by westerners, and recently, it has been more and more loved by China people.
Opal, the mineral name is golden emerald. Because it contains rutile needle-like inclusions or feather-like fluid inclusions, from a proper point of view, refracted light will form bright light bands, which can change with the movement of light, like cat's eyes, hence the name. Opal is one of the five precious stones, mainly produced in Sri Lanka, Brazil and China.