For sale is a very very unique agate from Agate Creek, Nth Qld. This is so unique that it is extremely difficult to determine if it is actually an agate thunderegg or a agate geode, normally the association of ryholite would be the identification feature, for a thunderegg, but in this case the rear of the specimen and the sides have been ground back, removing any rhyolite that was possibly there. Personally I think it probably is a thunderegg , but Im not totally sure, I think there is some evidence of small rhyollitic inclusions in some areas of this amazing piece. Now why is this unique, well first the double egg, one inside the other, with the open cavity in between. Next is the amazing boxwork goethite (possible hematite) visible between the two eggs, this is the first time I have ever seen anything like this in an Australian agate!!
AGATE CREEK, NTH QLD.
115 x 72 x55mm.