What’s this rock?

[Nice65]

Found on a driveway of similar sized marine aggregate, this one was shiny blue in the rain amongst all the whites and browns. If tapped on another stone it is definitely rock and not fired clay and looks like the sort of rock used in aquariums. Any ideas, and how did it get in amongst the gravel?

 

[Tengu]

Id say low grade turquoise

 

[BJJJ]

Metamorphic gneiss possibly ?

 

[Paul_B]

Gneiss find in your driveway!!!

IGMC!

 

[nigelp]

Gneiss find in your driveway!!!

IGMC!

You’ll get slated for that…

 

[bobnewboy]

Looks like malachite to me - copper ore. We used it when I was on a Will Lord bronze casting course. You have to make the bronze first….

 

[Nice65]

Looks like malachite to me - copper ore. We used it when I was on a Will Lord bronze casting course. You have to make the bronze first….

It does have the malachite layers, but is much more blue than green.

 

[Paul_B]

I think you can get copper ore secondary weathering on some rocks but you really need a fresh surface to see it clearly. Give it a whack! It's always worth having a rock hammer if you're into geology. I got one when I studied it at school. Still got it somewhere.