ATHENA MINERAL: Mineral Data; Pierre Perroud

ATHENA

MINERALOGY

Mineral:	AGATE = layered CHALCEDONY
References:	Rykart (1989)

Quartz "Agate", Brasil
The picture shows the infiltration's canal
with the successive chalcedony layers with more or less iron oxides.
Photo and coll. P. Perroud (now in NHM Geneva).
See also: athena.unige.ch -> mineral pictures

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