It’s one of my most prized thundereggs – a large Gottlob specimen from Germany with amethyst.  But also, this is one of the very few thundereggs I’ve ever seen that have changed over time.  When I first got it, about 5 years ago or thereabouts, I scanned it as usual and added it to my gallery:

Gottlob10

However, over time, the agate lost its clarity – the colours brightened.  Preparing to sell it’s other half as part of a downsizing, I finally got round to imaging the rock a second time – again by scanner.  Side by side, the difference is quite dramatic.

Gottlob 04

German thundereggs are much older than most of the US specimens, yet this one transformed in just a few years after being dug up.  I have two shelves full of Gottlobs, but this is the only one to have transformed to anything close to this extent.  It’s still beautiful – maybe even more so.

 

Check out more Gottlobs here: http://www.thundereggs.co.uk/germany/index_Gottlob.html