На рынке ювелирных изделий, you can also see a variety of cryptocrystalline quartz, which is colorful and made into rings, подвески, ornaments, и т. д.. It is inexpensive and very popular. This is chalcedony. Chalcedony is another series of gemstones in the quartz family. There are many types of gemstones belonging to the chalcedony system with different […]
