Chalcedony and agate are very similar to gems, and people always confuse them. However, chalcedony and agate are still very different. So, which is good for chalcedony and agate?
Although the constituent materials of chalcedony and agate belong to quartz (mainly silica), there are also obvious differences. Because the conditions of formation are different, the internal structure is also very different. Chalcedony is a recessive crystal of hydrous quartz, which is closer to crystal, but agate is a gel of dehydrated silica. Therefore, the permeability of chalcedony is extremely strong, and agate is much inferior to it. The chalcedony is mainly green (commercial name "Australian jade"), red (commercial name "blood drop"), gray blue (commercial name is "Taiwan sapphire"). Chalcedony is not like agate, it has streaks, and chalcedony is not striped. This is the main way to distinguish between agate and chalcedony.
Chalcedony is a quartz group mineral (like crystal, opal), so the output is huge and the price is not very high. The agate collection with its typical shape has a high value. The texture of agate is very hard, and it takes dozens of processes to make it. Therefore, the more complex the shape, the higher the cost, and the higher its value.
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