Grape stone is a semi-precious stone that people like to wear, because the grape stone has a refreshing green color, and the body will be filled with positive energy after wearing. Grape stone is also the stone of wealth, it can call the fortune for the wearer. There are many green chalcedony in the market similar to grape stone. Friends know what is the difference between grape stone and green chalcedony?
Grape stone
Green chalcedony
Difference 1: different ingredients
Grape stone and green chalcedony belong to different minerals. Like green chalcedony, it is also known as green agate, which is cryptocrystalline quartz, which is one of the most valuable quartz ores. Grape stone is a natural silicate mineral.
Difference 2: different refractive index
The refractive indices of grape stone and green chalcedony are completely different. The refractive index of the green chalcedony is 1.55, and the refractive index of the grape stone is 1.616-1.649, so the refractive index of the green chalcedony is lower than that of the grape stone.
Difference three: different hardness
The hardness of grape stone and green chalcedony is also different. The hardness of the grape stone is 6-6.5, and the hardness of the green chalcedony is 7. Although the hardness of the two is different, it is relatively close.
Difference 4: different transparency
The transparency of the grape stone is between transparent and translucent, but the green chalcedony presents a translucent state.
Difference 5: different optical characteristics
Grapevine has no ultraviolet fluorescence, and its absorption spectrum is a weak absorption band of 438 nm. Chalcedony UV fluorescence can sometimes be weak to strong yellow-green fluorescence, and its absorption spectrum is not characteristic.
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