I have long been flirting around the two locations at Sailauf (the other being Rehberg, which I have yet to find). They do occasionally crop up for sale, so they are not the rarest thunderegg under the sun. But they are a location that always annoyed me! They are so prone to being incomplete, muddled, broken – smears of red in a shattered white wreckage – that I just couldn’t! Irregular I like – but incomplete just drives me crazy. Call it an obsession! In the end though, I finally found a specimen that I like, and in a somewhat unexpected way, because if I hadn’t published the Michigan Keweenaw stone a month or so ago, this would be the smallest thunderegg I have ever seen. It is only 2.6cm across – a tiny red and white crumb. Even so, it has a very nice thunderegg structure that puts most of the larger specimens I have seen to shame. So here is another new location for Germany!
Other half can be seen on the gallery: http://www.thundereggs.co.uk/germany/index_hartkoppe.html