.	Dwarves' Earth Treasures Museum: Thundereggs of Kazakhstan	.

    Those thundereggs may be largest thundereggs wtih colored agate cores I have evern seen so far, but like Jano thundereggs, they were often broken down to obtain the agate core themselves. Most are hollow lined with colorless to reddish yellow agates, commonly with waterline features. Due to their large sizes, it is difficult to import them from Kazakhstan and most are too big for me to collect. :) I got the smallest one I could find.