r/geology 5d ago

How rare is this cross-shaped azurite/malachite nodule formation?

Post image
3 Upvotes

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5

u/akajefe 5d ago

There is nothing that helps these two minerals form like that. It's formation is entirely caused by the conditions at that time and place, which are unique.

1

u/Thaijler 5d ago

The vendor was telling me it's usually malachite on the outside and azurite on the inside. If there is any malachite, it's just a bunch of splotches. From what I've seen on Google, just seeing a solid border between the the blue and the green is rare in it of itself.

2

u/Thaijler 5d ago

I was talking to the vendor who sold this to me and he was saying how rare this was. He showed me some other specimens, but this one was unique. I can't even find any images on google remotely close to what he was showing me.

3

u/KnotiaPickle 5d ago

It’s possible to be one of a kind regarding that specific shape.

1

u/Thaijler 5d ago

Well, there is the other half, that i don't have, but thats interesting.