One of this Lierbachtal thundereggs was my first ever :) , which I bouhgt as a boy at a show. Lierbachtal’s are Thundereggs with a unique matrixstructure, agate not always that colorful, but a large variety in its appearance. Lierbachtal eggs come from more then 15 various sites, found quite near to each other.
Characteristic for Lbt’s is the matrix structure which, magnified, can have a feathery look. Seeing these structures one can imagine why onion skin patterns are common in LBt’s.