Fossilized Coral or Sedimentary Mineral Conglomerate
Fossils & Geological Specimens

Fossilized Coral or Sedimentary Mineral Conglomerate

This specimen is a fossiliferous or mineralized geological object, appearing as a rugged, irregular mass held in a human hand for scale. It possesses a predominantly monochromatic palette consisting of various shades of tan, beige, off-white, and dark brown earth tones. The physical construction is highly irregular and porous, showing evidence of conchoidal weathering and internal crystalline structures. Notably, the surface features small, circular, and tube-like indentations that suggest the presence of agatized or silicified fossil remains, possibly colonial coral or bryozoans encased in a dense limestone or flint matrix. The material appears extremely hard and calcified with a rough, abrasive texture. There are no signs of human manufacture, marks, or artificial alterations; it is a natural specimen likely millions of years old. The condition is raw and unpolished, showing some surface dirt and natural fractures consistent with field recovery. The presence of darker, speckled mineral inclusions adds to its geological complexity. This piece represents a high-quality natural science specimen characterized by significant mineral replacement and preservation of organic structural patterns.

Estimated Value

$45.00 - $75.00

Basic Information

Category

Fossils & Geological Specimens

Appraised On

February 20, 2026

Estimated Value

$45.00 - $75.00

Item Description

This specimen is a fossiliferous or mineralized geological object, appearing as a rugged, irregular mass held in a human hand for scale. It possesses a predominantly monochromatic palette consisting of various shades of tan, beige, off-white, and dark brown earth tones. The physical construction is highly irregular and porous, showing evidence of conchoidal weathering and internal crystalline structures. Notably, the surface features small, circular, and tube-like indentations that suggest the presence of agatized or silicified fossil remains, possibly colonial coral or bryozoans encased in a dense limestone or flint matrix. The material appears extremely hard and calcified with a rough, abrasive texture. There are no signs of human manufacture, marks, or artificial alterations; it is a natural specimen likely millions of years old. The condition is raw and unpolished, showing some surface dirt and natural fractures consistent with field recovery. The presence of darker, speckled mineral inclusions adds to its geological complexity. This piece represents a high-quality natural science specimen characterized by significant mineral replacement and preservation of organic structural patterns.

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