Dwarves' Earth Treasures Museum: Thundereggs of Bysta,
Slovakia Republic
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I managed to obtain some thundereggs from Slovakia
Republic thru a trade with a guy from Slovakia Republic. All of the colors
from that country are mainly colorless to light blue sometimes with yellowish
tint as typical in many common agates and thundereggs.
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Rough Appearance: Smooth bubbly surface on unweathered thundereggs.
A mix of yellow and bluish black colors on cut thunderegg shells are
dead giveaways.