thunderegg

C53673
concept

A thunderegg is a nodule-like rock, typically formed in volcanic ash layers, that contains a core of agate, opal, or other minerals within a harder outer shell.

All labels observed (1)

Label Occurrences
thunderegg canonical 1

Description generation (CDg)

The one-sentence description above was generated by prompting gpt-5.1 with the class name and this instruction.

Instruction
generate a one-sentence description for a given conceptual class.
# Response Format
Return only the sentence: "Description: [one-sentence description of the conceptional class]"
Input
Class: thunderegg
Generated description
A thunderegg is a nodule-like rock, typically formed in volcanic ash layers, that contains a core of agate, opal, or other minerals within a harder outer shell.

Instances (1)

Instance Via concept surface
Oregon thundereggs