The
"Puma" Agates appear to be a type of sedimentary concretion formed by
water or evaporate mineral expansion of fossils, likely crinoid heads in
a similar manner as the Indiana "Geodes",
Kentucky & Alabama Agates. The agates come a range of colors such
as white, gray, red, orange, yellow, black brown, and blue with brown to
orange colors being most common colors while black colors being more
scarce. Some agates contain multiple fractures that have
been "healed" and bleached by water giving them a chambered look.
Important
Note! There are several trade-names given
to the same type of agates. They had been sold under the names of "Puma"
"Neuquen" and "Samtra" agates
even the sources expand from Marlarque in Chubut province to northern
Neuquen provinces. It's difficult to distinguish the agates from several
locations in both Chubut and Neuquen provinces.
Rough Appearance: "Puma" Agates come in cauliflower-like shapes. Some feel rough, some feel smoother.
Can be light-tan to reddish. The jasper-like agates surrounded by thick quartz bands are give-aways.
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