What is grape stone?
Grape stone foot A calcium aluminosilicate mineral with white, light yellow, flesh red, green, and colorless, but common in green. Glass luster, mainly translucent. The shape of the grape stone is a plate, a sheet, a grape, a kidney or a radial aggregate. The density is 2.80-2.95 g/cm3, the refractive index is 1.616-1.649, and the hardness is 6-6.5.
Where is the main producing area of ​​grape stone?
A: The main producing area of ​​gem-quality grape stones appears in the volcanic rocks near New South Wales, Australia. In addition, the United States, India, Germany, Austria, South Africa, Namibia, Canada, China and other places also have output.
What are the gems that are easily confused with grapes?
High-quality grape stone will appear like a glass of jade, so some merchants will sell high-quality grape stone as jade. However, there are essential differences between the two: the grape stone has a radial fiber structure, and the jadeite fiber has an interwoven structure. In addition, the density, refractive index and hardness of grape stone are lower than jadeite, so be sure to pay attention to the difference when purchasing. In addition to being similar to jade, green garnets are also easily confused with grape vines, but it is easy to distinguish green garnets from grape vines by paying attention to the different contents of the garnet. Green garnets are generally rich in needle-like inclusions, while the interior of the grape stone is very clean or has a radial fibrous structure.
What should I pay attention to in the daily maintenance of grape stone jewelry?
Grapestone has a Mohs hardness of 6-6.5, which is not a high-hardness gemstone, so wear it when you wear it. If the grape stone jewelry needs to be cleaned for a long time, it is recommended to clean it at a professional institution or merchant. Ultrasonic cleaning is not recommended for grape stones with more internal cracks, as ultrasonic vibrations may increase the cracks and thus the risk of gem breakage. When storing grape stone, it should be stored separately to avoid contact with other gemstones, causing surface scratches. It should be cleaned before storage and cleaned with a dry soft cloth.
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