Pérolas nucleadas são divididas em duas partes, o núcleo e a nácar, de dentro para fora. A camada mais interna é o núcleo. O NACRE é um cristal de queratina e carbonato de cálcio formado na superfície do núcleo de pérolas ou corpo estranho pelas secreções da ostra de pérolas durante o cultivo ou […]
Arquivos de autores: Kingjy
There are many places where pearls are produced in the world. Natural pearls are mainly produced in the Persian Gulf, Red Sea, South Pacific, Gulf of Mexico, etc.. They can be divided into Eastern Pearl, Southern Pearl, Australian Pearl, Southern Ocean Pearl, Black Pearl, Oriental Pearl, etc.. Due to pollution, the yield and quality of […]
The quality evaluation method of pearls can be said to be very systematic and scientific, just like the 4C grading of diamonds. The international evaluation of pearl quality mainly includes the following aspects: cor, luster, transparency, textura, shape, tamanho, etc.. In the case of cultured beads, there is also the problem of the thickness of […]
Aquamarine (Aquamarine), the mineral name is beryl, is a beryl with a lot of iron elements, as a long-standing gemstone, in the 19th century, people used aquamarine as amulet to protect sailors. Aquamarine also has some historical legends intertwined with expectations and superstitions. It has long been considered a symbol of happiness and eternal youth, […]
cryptocrystalline quartz jade. Chalcedony and agate have a very long history. About 100 million years ago, underground magma spewed out due to the changes in the earth’s crust. When the lava cooled, steam and other gases formed bubbles, and the bubbles were sealed when the rock was frozen to form many holes. After a long […]
German glasses brille extends from beryl, because the earliest spectacle lenses were ground with colorless beryl. The color of beryl gemstones is one of the classification criteria. (1) Emerald. With chromium or iron as the color characteristic, green beryl with emerald green color can be slightly yellow or blue, and its typical characteristic is the […]
(1) Cor. A melhor cor esmeralda é aquele verde esmeralda forte com um tom azulado, que o verde tornará as pessoas inesquecíveis. Verde positivo e verde grama levemente amarelado também são muito bons, enquanto o verde escuro e o verde claro são cores inferiores. (2) Clareza. A clareza das esmeraldas geralmente não é muito boa, with large […]
The main varieties of chrysoberyl gemstones, cat’s eye and alexandrite, are important precious gems in the world. In addition to cat’s eye and alexandrite, chrysoberyl gemstones also include chrysoberyl, which refers to gold that does not have the discoloration effect and the cat’s eye effect. Emerald gems. Entre eles, there are no special optical effects, […]
Em 1830, a gem that changed color was discovered in the Ural Mountains in Russia, namely alexandrite. This day happened to be the birthday of Emperor Caesar Alexander II of Russia, so he named him Alexandrite after the Emperor of Russia. It was also called “Alexandrite” no mercado. The color of alexandrite changes with […]
(1) Cor. The beeswax yellow is the best, followed by green, yellow-green, yellow-brown, gray-green and gray-yellow again. When the light illuminates the gemstone from the side, half of the cat’s eye is its body color, and the half becomes other colors, which is also a good performance. As for cat eyeliner, the brighter and more […]