Interesting "Rock"

Recently some friends commented on my interesting volcanic agate "bomb" or "thunder-egg"so I thought I would share it with you. Thunder-eggs are produced by volcanoes and look very nondescript on the outside but hide beautiful colours in the middle. While the structure of the whole “eggs” are remarkably similar, their interior agate, opal and quartz cores– along with inclusions of rhyolite shards, moss, and plumes– provide an endless variety, no two being exactly the same.

I have a bit of a soft spot for rocks ... at school I wanted to do Geology for my HSC but my school didn't offer it, even though my Physics teacher's major had been Geology, and then I considered doing it at Uni .... but was dissuaded by the fact that in the late 70's females weren't allowed underground in mines so that would have seriously limited my employability. I chose textiles instead. I wonder how my life would have been different if I had chosen the other path? Lapidary and fossils instead of patchwork? A remote country home instead of city one? I like to look around me at rocks and landforms when we get out travelling and orienteering and plan to visit volcanoes on our travels whenever possible. I am a sucker for gift shops and museum shops with polished stones and fossils!