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Agates from Yozgat are showing colours only very rarely - however they are because of their complicated internal structure desired items of collection.
A multiplicity of valves ("spraying holes", "influx openings") testifies the expansion of the semidurable gel during the silicate-agglomeration-process.
Also the formation of fascinating "wegeler" ("shadow effect") -agates distinguishes the agates of Yozgat.
