
Polished River Agate Nodules
This specimen is a natural agate or chalcedony nodule, characterized by its semi-translucent to opaque appearance and a smooth, water-worn texture. The stone displays a muted, smoky gray and brownish-gray color palette with subtle inclusions and characteristic orbital or 'eye' patterns common in botryoidal formations. It is palm-sized, measuring approximately 2.5 to 3 inches in length, and appears to have been naturally tumbled or lightly hand-polished to a low-luster sheen. The surface shows minor natural indentations and pitting, but no significant fractures or cleavages are visible, suggesting a high structural density. There are faint brownish iron-staining oxulations in some of the deeper crevices, providing a natural patina. As a geologic specimen, it lacks maker's marks or signatures and is an ancient natural formation, potentially millions of years old. The quality of the chalcedony suggests it could be suitable for further lapidary work such as slicing or cabochon cutting to reveal internal banding.
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Estimated Value
$45.00 - $75.00
Basic Information
Category
Rocks, Fossils & Minerals
Appraised On
April 6, 2026
Estimated Value
$45.00 - $75.00
Item Description
This specimen is a natural agate or chalcedony nodule, characterized by its semi-translucent to opaque appearance and a smooth, water-worn texture. The stone displays a muted, smoky gray and brownish-gray color palette with subtle inclusions and characteristic orbital or 'eye' patterns common in botryoidal formations. It is palm-sized, measuring approximately 2.5 to 3 inches in length, and appears to have been naturally tumbled or lightly hand-polished to a low-luster sheen. The surface shows minor natural indentations and pitting, but no significant fractures or cleavages are visible, suggesting a high structural density. There are faint brownish iron-staining oxulations in some of the deeper crevices, providing a natural patina. As a geologic specimen, it lacks maker's marks or signatures and is an ancient natural formation, potentially millions of years old. The quality of the chalcedony suggests it could be suitable for further lapidary work such as slicing or cabochon cutting to reveal internal banding.
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