A relação entre o peso de uma pedra preciosa de mesmo volume e o peso da água é chamada de gravidade específica.. Divida o peso da pedra preciosa no ar pela diferença entre o peso da pedra preciosa no ar e o peso da pedra preciosa na água, and the value […]
Arquivos de categoria: Notícias de jóias
Os minerais de pedras preciosas geralmente têm um valor fixo, forma de cristal independente, e o padrão da rede cristalina é determinado pelas propriedades físicas do mineral. Normalmente, a forma do cristal da pedra preciosa afetará a forma como a pedra preciosa é cortada.. O sistema cristalino de gemas é dividido em: Isométrico, Tetragonal, Hexagonal, Trigonal, Ortorrômbico, e Monoclínica. Monoclínica), Triclínica […]
De acordo com pesquisas, esmeraldas foram extraídas no Egito, na margem oeste do Mar Vermelho, mais de 4,000 anos atrás. A pedra preciosa favorita de Cleópatra são as esmeraldas. Ela não apenas nomeou uma mina de esmeraldas em seu próprio nome. Em nome de Cleepedro, ele também recompensou os ministros com as finas esmeraldas ali produzidas. Thanks to […]
Among the colored gemstones, golden emeralds are expensive gems with low output but very popular. The color of chrysoberyl ranges from yellow to yellow-green and yellowish brown. It is similar to the shape of golden beryl. Since the refractive index and hardness of chrysoberyl are higher than that of beryl, the luster after cutting is […]
Both alexandrite and opal alexandrite belong to the golden emeralds among the colored gems, and they are treasures among gems. Em 1830, a color-changing gem was discovered in the Ural Mountains of Russia. This day happened to be the birthday of Emperor Kaiser Alexander II of Russia, so it was named Alexandrite after the Emperor […]
Pearls symbolize purity, tenderness, love and peace. It is said that pearls are the favorite of the goddess of the moon. In Western astrology, pearls are also the guardian stone representing the moon. In the history of ancient civilizations, pearls have a very lofty status and are one of the few gems that were regarded […]
Pearl appeared in human history quite early. People in ancient times believed that it had a powerful power, so it was given many mysterious legends and occupied a large area in jewelry. Ancient priests often put a pearl on their foreheads to enhance their spiritual power. These priests are usually the most powerful figures in […]
Pearl is the most valuable and most important kind of organic gemstones. It is formed by enveloping the pearl core with the pearl secreted by shellfish, so unlike other gemstones, which have crystal form and chemical composition, the main chemical composition of pearl is 90%. The above is calcium carbonate, the rest is water and […]
Although cultured pearls are artificially implanted into the nucleus, the results depend on biological phenomena. Even if the implanted nuclei are all round, they often appear in many different shapes under the nacre secreted by shellfish. It can be classified into the following types: redondo, off-round, pear-shape, circular shape, and baroque. De um modo geral, the round […]
All pearls produced in the South Pacific are called South Sea Pearls. In terms of appearance, South Sea Pearls are generally larger in size, sobre 9 para 20 cm in diameter, and their luster and skin brightness are better than the other two pearls. South Sea pearls can be divided into white South Sea beads, […]