Both anatase and brookite belong to the oxide minerals of titanium, which are two homogenous and polymorphic variants of rutile minerals. Anatase is a very rare mineral. Its composition often contains impurities such as ferric oxide and tantalum, niobium, tin, and manganese. It belongs to the tetragonal crystal system. Transparent to opaque, hardness is 5.5-6.0. Its colors are black, reddish brown, marrón, deep indigo, green and blue, with strong pleochroism, marrón, yellowish brown and greenish blue, and have strong dispersion. The composition of brookite also often contains iron trioxide, which belongs to the orthorhombic crystal system. The crystals are plate-like or columnar. The crystals have stripes in the longitudinal direction, with diamond luster to semi-metal luster, transparent to opaque. The hardness is also 5.5-6.0. Its color ranges from brown, yellowish brown, reddish brown to black, and blue, but it is rare. The pleochroism is also obvious, with yellowish brown, reddish brown and orange to golden brown. Brookite is divided into multiple varieties by color.
The dispersion of anatase is higher than that of diamond. The brown transparent crystals can be polished and processed into faceted gems, and their colorfulness can even exceed that of diamonds, but the particles are small and generally rare. The difference between anatase and diamond is that it has high density and low hardness, and it can be distinguished from similar rutile by its low refractive index and low specific gravity. Brookite is most precious with pure red transparent crystals. Gem-grade transparent crystals can be polished into faceted gems. Because of high dispersion, yellow transparent crystals can be used as substitutes for yellow diamonds, but they are extremely rare and are mainly used for collection. Brookite can be distinguished from diamonds based on its density and refractive index, and it is distinguished from these gems by its unique plate-like crystal morphology and density less than rutile and greater than anatase.
Both anatase and brookite are produced as accessory minerals in magmatic rocks and metamorphic rocks, as well as in hydrothermal veins and placers. The world’s main sources of anatase and brookite are the United States, Brazil, Gran Bretaña, Francia, Switzerland and Russia. Taiwan, China also produces gem-grade anatase.
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Diseño del fabricante de joyas OEM/ODM personalizado sus propias joyas
Empecemos : mo@kingjy.com
Guangzhou Jingying Enfoque en collares de anillos al por mayor de pendientes de pulseras de brazaletes de plata esterlina 925 joyas,oro de plata esterlina chapado con 18k,14K,24K oro amarillo,oro blanco y oro rosa. Es capaz de personalizar joyas de plata esterlina varios diseño,marca de logotipo u otras palabras por grabado láser de acuerdo con el requisito del cliente.
Nuestra capacidad de producción mensual está a la altura 50,000 Piece de pulseras Pendientes del collar Joyas del anillo. Entrando en una asociación con los supermercados,cadena de joyería,tiendas de salida,mayorista de joyas,Compañía de la marca de comerciantes y joyas,Professional Proporcionar Joyas personalizadas y producción en masa de alta calidad 925 servicio de joyería de plata esterlina.