Tweed Valley - Perch Creek Thundereggs
Presumably one of the main Tweed Valley locations, but showing an immense amount of variation indicating several different geological areas.
Perch Creek Thunderegg With Waterlines and Cave
Red-Brown Perch Creek Thunderegg with Waterlines
Perch Creek Thunderegg with Green Mineralisation
Complex Green Perch Creek Thunderegg
Gigantic Perch Creek Thunderegg that Single Handedly Saved the Australian Postal Service
Countries:
USA - Canada - Alaska - Mexico - Argentina - Peru - France - Germany - UK - Poland - Greece - Turkey - Romania - Bulgaria - Slovakia - Kazakhstan - Uzbekistan - Russia - Japan - Ethiopia - Iran - Australia - Unknown