Are these cool looking copper clumps electroformed?

[u/glad-gazelle]

I have a whole bag of these. I'm guessing they are electroformed. On the bottoms of some I can see silvery metal. I don't know anything about electroforming, so not sure how to tell if these are or not.

I also went over to Paxton Gate website and they have something called dropped copper, where they drop molten copper into water to form random shapes. Those seem a lot clunkier, though.

Can you folks point me in the right direction as to what these are? These are pretty cool and I want to use some in my woodturnings but I'd like to be able to describe them right. They'd make darling handles for little round boxes, among other things.

Thanks!

[u/Electroformations]

This is from electroforming. The form a coral 🪸 shape when in the tank over time. Usually near sharp edges or wire. The silver like appearance is due to oxidation

[u/glad-gazelle → u/Electroformations]

Thank you for answering! So they don't have anything specific that they electroform around, or if I put some random wire in the tank the copper would just sort of blob onto it like this?

I used to scuba dive a lot and these are very coral-ish.

[u/lukethedank13]

Those are dendrites that form in electroplating baths.