Hey everyone!

I’m trying to identify these rocks so if you have any ideas please tell me! :D

From light blues to greens with intense green veins/spots.

Mostly opaque surface with shallow transparency, where most of the green colored veins are.

They are dense, hard, heavy for their size. (average dimensions: 3 x 2 cm, 2cm diameter) Hard to brake. If fractured, it shatters it in 2, no clean cuts.

I tried to scratch a few with a hardened marking tool which had almost no effect.

They feel a bit oily, greasy and smooth/polished feel.

Found along the Rhone in the Swiss Alps.