The Museum of Mineralogy belong to the University and it's one of the less known museums in Hamburg - maybe because it's only open for two days per week. But it has an amazing collection and it's free of charge.

the blue bobble is canvasite, on a piece of stilbite

Pyrite also known as Fool's Gold - it is beautiful. The piece was rotating under a spotlight and the reflections were mesmerizing. When I visit a museum or art gallery, I choose three pieces that I would steal if I could and that is definitely of of them. It's fun to compare lists when you visit a museum with other people :)
As an aside, the explorer Martin Frobisher (1539 – 1594) loaded his ship with 1500 tons of Pyrite when travelling in Northern Canada, believing it to be gold. He made a second voyage and brought back another 1300 tons, only to be told that it's worthless. Whatever did the do with all that stuff?

a marcasite nodule

a piece of silver (the second item on my to steal-list)

gold

gypsum - the formation is known as desert rose. I'd love to touch one.

a detail from a piece of vivianite

onyx

crocidolite, also known as blue asbestos

I forgot to take a picture of the sign, so I don't know what this is - but it's the last item on my list :)

a piece of fossilized tree - reminds me a bit of a Jackson Pollock painting

azurite (blue) and olivenite (green)

again, I don't know what that is - but it looks like a cubistic painting
I hope you enjoyed the visit! Continue to travel the world with the
MyWorld Tuesday meme.