🔎 UNIDENTIFIED South-Sweden rock

[rockpassion]

Hi everyone, i got this rock as a present and it comes from south-Sweden. Would love to know the rock type.

 

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[rockpassion]

here are some photo's of the broken surface and the internal structure. The rock is very dense and very hard and atracts a magnet weakly. The outer surface has a needle-like structure.

 

[beepbleep]

It looks like granite.

 

[rockpassion]

It is very dark inside almost black and has large crystals of some look like olivine.

 

[ToddsPoint]

In Sweden it’s probably called dolerite instead of diabase. I do lapidary work and your porphyry is workable with diamond tools and takes a nice polish. I have lots of diabase and basalt porphyry in the glacial till that came from Canada and carve it often.

 

[rockpassion]

In Sweden it’s probably called dolerite instead of diabase. I do lapidary work and your porphyry is workable with diamond tools and takes a nice polish. I have lots of diabase and basalt porphyry in the glacial till that came from Canada and carve it often.View attachment 2188895View attachment 2188894

Oke very nice,