Difference between agate and chalcedony

Elaborate agate and chalcedony

The English name for agate Agate, is Latin Sicily agate River (Rive Achates) the name, this is Italy Theophrastus first found agate place. Agate from the word Buddhist, Sanskrit of the "the, meaning "horse brain." The English name chalcedony Chalcedony.
Agate and chalcedony are cryptocrystalline quartz mineralogy and collectively referred to as chalcedony. Gem industry to which a pattern with block structure aphanitic quartz agate, said that if the block structure claimed no pattern with china gemstone wholesaler chalcedony. Agate, SiO2-based chemical composition, but also often contain trace elements such as iron, manganese, nickel. Crystal form is aphanitic, with a granular, fibrous structure, often bell emulsion aggregation, kidney-shaped, nodular and compact block. Agate ring with various color stripes.
Agate and chalcedony were pure white, which with the pigment color of ions and impurities to agate is very rich, so the "thousands of agate 10,000 kinds of jade", which color is red, blue, green, light green, yellowish brown, brown, purple , gray, black and other colors, and there is concentric shape, layered, corrugated, stripe-like all kinds of patterns. Oil sheen to the glass luster, transparent to translucent. Refractive index 1.54-1.55. 7 hardness, density 2.61-2.65g/cm3.
Jade agate and chalcedony with similar distinction. Agate and chalcedony under different colors, patterns and other patterns can bring to distinguish. Chalcedony products easily and Tanglin stone, close jade, jasper and so confused, according to color, texture, density and so on to distinguish the difference. Chalcedony products bright, cryptocrystalline texture, fine texture. Dongling stone quartzite coarse particles, fine structure, texture is relatively rough. And similar to jade green chalcedony with green jade, turquoise, amazonite, etc.. Green Jade porphyroblast interwoven structure of crystals or fibrous plaque can be seen jadeite crystals. Turquoise poor transparency, porcelain luster, hardness low, for 5-6. Tian Shi obvious lattice fringes.
Agate by morphological characteristics can be divided into the following varieties: onyx (with sardonyx and agate cut sub-divided), red onyx, moss agate (also known as dendritic agate), Moonstone (also called the Walled City Agate) , fire agate, agate water tank. Nanjing famous "stone" is constructed with a concentric pattern of a agate. Agate the evaluation and selection factor is the color, transparency, fragmentation. Process requirements are brightly colored, pure color thickness; surface smooth, transparent; decorated uniform, clear, good linearity; texture and delicate, tough; no crack or cracks less; block degree. Red and blue is the best.
Chalcedony varieties: green chalcedony (also known as Australian jade, China, also known as the British card stone), dark green chalcedony, Bi Shi, blood Chalcedony (also known as bloodstone) and so on. Chalcedony color pure and beautiful, the bigger the better fragmentation. Chrysoprase, light green chalcedony were the most precious quality. Chalcedony ring more than processed into noodles, bracelets, necklaces and other jewelry.
A water tank, China's largest agate art - Grand View Garden, weight 7350 grams, gallbladder volume of more than 1.1 thousand cubic centimeters in possession 850 grams of water, the water formed when the china gemstone wholesale gall bladder is wrapped in. agate, very rare, called treasures. Many countries to sardonyx and peridot as "August birthstone," Westerners think that wearing it is a symbol of marital harmony, loving, happy, hailed as "stone of happiness."
Agate occurs in volcanic rocks hydrothermal ore deposits, volcanic fissures and cavities.
Chrysoprase cause one point of view is the role of volcanic hydrothermal results. Many world famous agate origin, Brazil and China, Yunnan, onyx, and the large agate, India, the United States producing moss agate, Russia, Iceland, India, the United States, Chinese-made off-white agate. China is producing agate power. Produced in the world of quality Chrysoprase Queensland, Australia, Sri Lanka, India and other countries.