Australian chalcedony is a type of chrysoprase, also known as South Sea chalcedony, named after its origin in Australia. It is also known as "Inka" stone in China. Australian chalcedony is apple green or pinkish green due to the presence of nickel oxide, with a fine and uniform texture, a single uniform color, translucent, H=7, G=-2.58-2.64.
Australian jade Foreign name: Chrysoprase Alias: Green chalcedony, South Pacific jade.Hardness: 7 Color: apple green or pink-green Origin: Australia
Australian chalcedony is a kind of green chalcedony produced in Australia, which is cryptocrystalline quartz, translucent and green, often made into a ring face, extremely similar to the color of high-grade jadeite. It is a microcrystalline quartz aggregate containing 0.5% to 1% nickel oxide, and resembles jadeite more than green agate.
Australian jade is the most common variety of jade in nature, and one of the oldest in human history. It appeared as an ornament in China as early as the Neolithic era and has been used for generations since.
Australian jade resembles jadeite, but its color does not have the variation of jadeite's color shape, chroma, and hue. Although the color of Australian jade is green and vivid, the green color is not real, there is no green color shape, the green color is evenly distributed, there is a floating feeling, and there is a tender feeling in the vividness. The difference between it and artificially treated green agate is that artificial green agate is bright green and shines blue in green.
Because of its bright green color, it is quite popular. It has some light transmission, fine grains and low price, which once confused some people. In fact, it is a kind of cryptocrystalline SiO2, which is called chalcedony or stone marrow in mineralogy. Australian chalcedony is not strictly speaking called jade, but green chalcedony, which resembles jadeite, but its color does not have the color shape, chroma and hue of jadeite. Although the color of Australian jade is green and vivid, the green color is not real, there is no green color shape, the green color is more evenly distributed, there is a floating feeling, and there is a tender feeling among the vividness.
Australian jade is produced in serpentinized nickel-bearing weathering shells, mainly pure peridotite. The main sources are the Malibolo and Kalgoor deposits in Australia. In addition, it is also produced in the United States, Brazil, and the former Soviet Union.
According to foreign records (Toshi Suzuki, 1916) the Chinese output of onion green chalcedony is quite reputable in the international market. Green chalcedony from Inner Mongolia's Zhuri and Baiyinuoer is produced in flint rocks and is striped, with light green green chalcedony and blood-red iron-bearing jasper. Green chalcedony from Taitung County, Taiwan Province is produced in Miocene andesitic agglomerate rocks in irregular veins with a maximum width of 30cm, and the ore is rich green with cyan color, which is one of the most valuable jade in Taiwan because of its beautiful rich cyan color and scarce production.
Australian jade is not strictly speaking called jade, but green chalcedony, which is quite similar to jadeite in appearance, but differs from jadeite in the following ways.
The color of Australian jade is too uniform, raw apple green, rarely dark green, very much like plastic, green performance is not real, the distribution is quite uniform, no green shape, green among the flash yellow tone, green and floating sense.
With a specific gravity of 2.60, Australian jade is much lighter than jadeite (3.24~3.43). When weighed in the hand, there is a clear difference.
The refractive index of Australian jade is 1.55, which is lower than the refractive index of jadeite.
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