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Dwarves' Earth Treasures Museum:
Neuquen Agates
North of Neuquen Province, Patagonia, Argentina, South America
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   Like the Puma agates, Neuquen Agates appear to be a type of sedimentary concretion formed from water-expanded (or gypsum-expanded) fossil crinoid heads very similar to Indiana "Geodes", Kentucky & Alabama Agates. Neuquen agates has a range of colors such as white, gray, red, orange, yellow, black brown, and blue with brown to orange colors being most common colors. The interesting characteristic of some Neuquen agates is that they contain multiple fractures that have been "healed" and bleached by water giving them a chambered look.
    Important Note! There are some conflicting information on such agates. They had been passed as "Puma" "Neuquen" and "Samtra" Agates even the source of Neuquen agates is about 250 kilometers from where the Puma Agates are found (Marlargue). The differences are that the Neuquen Agates have wider variety of colors and contain thicker crystallinzed quartz rims. The "Samtra" Agates may be actually Neuquen Agates coming fron Neuquen Province, not Mendoza Province.

Rough Appearance: Althrough the differences between Neuquen and Puma agates are not clear,
Neuquen Agates tend to have far rougher feeling and thicker quartz rims than those of Puma Agates, and both come in cauliflower shapes.

YOU CAN CLICK ON THE PICTURES FOR LARGER PICTURES
With chatoyancy agate fibers

You can see the Neuquen Agates for Sale at the Online Agate & Thunderegg Shop