23:34
Mody87
Agate with concentric drawing: 1 kontsentricheski layered agate alternation of the layers combined by different minerals, in spherical or oval 2 agate with investing ash value alternation of the zones differing on colour and a transparency, combined by chalcedony or chalcedony and 3 is rhythmical zone agate in a structure are marked steady or rhythms of the layers differing on mineral structure 4 agate a special case of a structure with investing ash value or concentrically layered when drawing of layers comes nearer to the polygonal 5 is symmetric zone agate in a cut is marked symmetry of placing of the zones similar on mineral structure, capacity and color in directions from the arch to the center and from a bottom to the center 6 is asymmetric zone agate the top and a cut bottom are not symmetric on capacity and mineral structure of zones, layers 7 moire agate alternation contrast on coloring thin 0,2 0,3 mm strips of chalcedony with sharp border between them and with poorly expressed tortuous. At position change in relation to a light source of a plane of a cut of agate, perpendicular to such strips, the original optical effect of moving , drawing modulation is created.
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