AMM274 Ammonite with Negative (South Dakota) Moroccan Agates Gibeon meteorites show Thomson structures Template:Template #1 Earthly Elements and translucent banded agate Cylinder8x20Onyx

Gibeon meteorites show Thomson structures (also called Widmanstätten patterns) and have high iron content

The term Schorl was in use before the 1400s

It has a few spots of black and brown inclusions from manganese oxide

This polished specimen displays dusty pink with hints of yellow and gray-blue

A 1 lb lot consists of 32 - 38 individual pieces

AMM274 Ammonite with Negative (South Dakota) Moroccan Agates Gibeon meteorites show Thomson structures Template:Template #1 Earthly Elements and translucent banded agate Cylinder8x20Onyx Gibeon meteorites show Thomson structures (also called Widmanstätten patterns) and have high iron content The term Schorl was in use before the 1400s