Gold Purity As the most malleable of all precious metals, gold is an excellent choice when crafting designs with very intricate details. Mais, it’s resistant to rust, tarnish and corrosion. Pure gold is too soft for everyday wear, so it’s alloyed with a mixture of silver, copper and a trace of zinc, to give it […]
Arquivos de categoria: Notícias de jóias
defect? Why are the cut shapes of the same gemstones different? What is the corresponding relationship between gem quality evaluation and price? e muitos mais. This requires salespersons to answer well. Only in this way can they play a better role in publicity and promotion. Because many precious natural gems, como diamantes, rubis, safiras, […]
There is a certain relationship between the caliber (inner diameter) of a jade bracelet and the thickness of the diameter. Aquilo é, when the jade bracelet is smaller, its diameter is also thinner; when the mouth of the jade bracelet is large, its diameter is correspondingly larger. Only in this way, a harmonious beauty will […]
(1) Intuitive method: the method of direct observation with naked eyes. This is also the most common and actual identification method. The inspection can be carried out from the following four aspects: ①In terms of color, forma, tamanho, lustro, etc.. If it is a bead or a batch of pearls, for real pearls, eles são […]
Diamonds are noble and luxurious ornaments, and jewelry with natural diamonds is the crown of jewelry. No entanto, diamonds are scarce and expensive, especially the larger ones, and most people don’t dare to care about them. Como resultado, the use of cheap gemstones, man-made gemstones and even glass to replace or pretend to be diamonds […]
(6) Artificial rutile: Rutile is an ordinary natural mineral, and its composition is titanium dioxide. Because its refractive index (2.61～2.90) is higher than diamond (2.42), it is polished into a gem. Bright and dazzling flashes and rainbow-like changes can appear afterwards, which is very beautiful. It is a pity that almost all natural rutile is […]
Em relação à ampliação de uma lupa para joias, algumas pessoas pensam que quanto maior melhor, na verdade não é, porque em termos de produção de lentes, excede 10 vezes e pode garantir sua qualidade óptica e abertura clara (a abertura clara da lupa é de 16-20 mm) Apropriado) é muito difícil; em segundo lugar, […]
Mais importante: Put artificial red and sapphire on white paper or in the water in a white container to observe. The color bands or growth lines are mostly curved and curved, while the hexagonal growth lines of natural products are slightly curved. The ribbon is straight. Além disso, the fluorescence of artificial rubies is stronger […]
Mas a sua composição química e propriedades físicas são muito diferentes. Por exemplo, esmeralda tem uma dureza de 7.5-8, enquanto a fluorita tem uma dureza de 4; esmeraldas têm uma densidade de cerca de 2,7g/cm3, enquanto fluorita (3.18g) /cm3), turmalina (3.05g/cm3) e esmeralda (3.33g/cm3) têm densidades mais altas. No teste interno com tribromometano, apenas esmeraldas flutuaram, e […]
Natural emeralds can be divided into two types: (1) American type: includes emeralds produced in Colombia, Brazil and the United States. It is characterized by low refractive index, small specific gravity, ultraviolet (long wave) irradiation and fluorescence, and the color turns red when observed with Charles filter. (2) African type: emeralds produced in Zimbabwe, Sul […]