Fallen Tree Cluster with Opal 'Floor' and Unusual Cave

This remains one of the strangest Fallen Tree Eggs I have seen - a cluster packed full of different unusual features. The floor of pure opal is a Fallen Tree classic, but that mineralisation of free-hanging blades and spikes is really exceptional. Note also the almost totally mineralised thunderegg at the top, filled with a swirled greenish growth. Attached to that is a tiny thunderbud filled with purplish/brownish crystals and - last but not least, there is a small patch of contrasting blue opal at the bottom. Absolutely fantastic and one of my most prizes specimens.

5" x 4.25"