The gem mostly presents the silk luster grain, then presents the special reflective effect namely the cat's eye effect. This is the very structure necessary for peter stone to be used as a gem. This kind of gem is quartz, chalcedony, agate, opal and other aggregate formed by late silicatization of gangue minerals in the vein.
Therefore, the blue variant produced by the incomplete silication process is called "falconite eye stone". There are also blue, yellow and black opals, called blue opals, often referred to as noble gems.Only a few places in china, henan and namibia, produce such minerals. Peter stone belongs to the tiger eye stone varieties, internationally known collectively (pietersite), there are also called "gem" the storm, is it green or blue stones asbestos quilt carbon dioxide nature silica gel clot after strong metasomatism and cementation of brown, brown, yellow, blue wait for color, with a silky lustre of dense hard quartz rock, because components has become quartz, the hardness is increased to 7, the proportion reduced to around 3.1, belongs to high-grade gemstone material. Please note that all my stones come from the earth and may therefore have natural chips, cracks, or fissures.
All notable flaws will be listed in the description.