Botryoidal Mineral Specimen
Mineral Specimen

Botryoidal Mineral Specimen

This is a raw, unpolished mineral specimen. Its overall shape is irregular, roughly resembling a kidney or organ form as viewed from above. The primary color is a translucent milky white to light brown, with darker brown and reddish-brown banding and inclusions. One of the most striking features is the botryoidal or bubbly texture present across a significant portion of the surface. Numerous small, rounded protuberances, varying in size, are clustered together, some exhibiting concentric banding patterns. There are also areas of smoother, fracture surfaces, particularly visible along the edges. The mineral appears to be a form of chalcedony, potentially agate or related silica mineral, given the translucent nature and banding. There are no visible maker's marks, signatures, or stamps. The specimen exhibits a natural patina and some surface irregularities consistent with natural geological formation. There are no obvious signs of damage or repair, and the piece appears to be in its found or raw state.

Estimated Value

$75 - $150

Basic Information

Category

Mineral Specimen

Appraised On

August 28, 2025

Estimated Value

$75 - $150

Item Description

This is a raw, unpolished mineral specimen. Its overall shape is irregular, roughly resembling a kidney or organ form as viewed from above. The primary color is a translucent milky white to light brown, with darker brown and reddish-brown banding and inclusions. One of the most striking features is the botryoidal or bubbly texture present across a significant portion of the surface. Numerous small, rounded protuberances, varying in size, are clustered together, some exhibiting concentric banding patterns. There are also areas of smoother, fracture surfaces, particularly visible along the edges. The mineral appears to be a form of chalcedony, potentially agate or related silica mineral, given the translucent nature and banding. There are no visible maker's marks, signatures, or stamps. The specimen exhibits a natural patina and some surface irregularities consistent with natural geological formation. There are no obvious signs of damage or repair, and the piece appears to be in its found or raw state.

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