
Botryoidal Chalcedony Specimen
This appears to be a rough, unpolished specimen of Botryoidal Chalcedony, also known as Grape Agate. The formation exhibits the characteristic smooth, rounded, clustered spheres resembling grapes. The color is predominantly a translucent to opaque white, with areas showing traces of earth-toned inclusions, possibly from the surrounding matrix. There are distinct concentric rings visible within some of the botryoidal formations, a common feature of chalcedony growth. The surface has a waxy to glassy luster in the smoother areas. The underside and edges appear to be the rough, natural break of the material, showing a granular or crystalline texture in places. The piece is irregularly shaped and fits comfortably in a hand, suggesting a moderate size, perhaps a few inches across at its widest point. There are no visible signs of polishing or treatment. Some small cavities or natural indentations are scattered across the surface. The quality of the botryoidal formation appears good, with well-defined spheres. No maker's marks, signatures, or other manufacturing details are expected or visible on a natural mineral specimen of this type. The estimated age would be geological.
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Estimated Value
$75 - 125
Basic Information
Category
Mineral Specimen
Appraised On
August 28, 2025
Estimated Value
$75 - 125
Item Description
This appears to be a rough, unpolished specimen of Botryoidal Chalcedony, also known as Grape Agate. The formation exhibits the characteristic smooth, rounded, clustered spheres resembling grapes. The color is predominantly a translucent to opaque white, with areas showing traces of earth-toned inclusions, possibly from the surrounding matrix. There are distinct concentric rings visible within some of the botryoidal formations, a common feature of chalcedony growth. The surface has a waxy to glassy luster in the smoother areas. The underside and edges appear to be the rough, natural break of the material, showing a granular or crystalline texture in places. The piece is irregularly shaped and fits comfortably in a hand, suggesting a moderate size, perhaps a few inches across at its widest point. There are no visible signs of polishing or treatment. Some small cavities or natural indentations are scattered across the surface. The quality of the botryoidal formation appears good, with well-defined spheres. No maker's marks, signatures, or other manufacturing details are expected or visible on a natural mineral specimen of this type. The estimated age would be geological.
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