The so called Janos-Agates ( sometimes called “Rainbow-Agate” ) are the formatized, trimmed and knapped centres of big thundereggs from Ejido Ojo Caliente in the area of Cerro el Tascate near the village Janos. These really big Thundereggs ( they are reaching diameters of 30 centimeters and more ... ) are presenting only small and thin agate veins (up to 30 mm wide). But these agate-veins are intensively coloured in yellow, green, blue, violett and all kinds of reds. The formation of big colour-pigments seems to be distinctive for the Janos-agate.
More informations about the locality and the agate-formation is given by Brad L. Cross in his book “The Agates of Northern Mexico” and by J. Zenz in his book “Agates”, Bode Verlag 2005, pages 442 and 443 .
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Northamerica/Mexico/Chihuahua/ Janos Agates |