Gröppendorf Thunderegg with a Rare Example of Warm Colours
It's probably staining and mineral deposits muddled up with crystal - a very unusual colour from here. 3.3cm
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Countries:
USA - Canada - Alaska - Mexico - Argentina - Peru - France - Germany - UK - Poland - Greece - Turkey - Romania - Bulgaria - Slovakia - Kazakhstan - Uzbekistan - Russia - Japan - Ethiopia - Iran - Australia - Unknown