I found a brown (ugly?) stone not far from where I live. Since I am always looking for weird things to cut I give almost any material a chance... so I cut it and made a quick polish just to get a view of how it would look like and if I could use it in one my jewellery pieces...
I would say around 3-4.
Matrix: White
Some veins with darker (green) minerals which should be >3-4 in hardness. Probably Pyrite may be seen in some spots on the back off the stone.
The green spots is black on the brown decomposed surface.
As I suppose its a rock found in Sweden I would suggest some kind of calcium based mineral. It looks similar to the mix of marble and diopside found around Sala silvermine, the pyrite specks are also common there.
If it doesn't scratch glass then it's not a quartz based rock, maybe it's calcite based such as marble. Calcite reacts to a tiny droplet of white vinegar with effervescence (I suggest trying white vinegar first as this acid acts softly, but you'll need to watch closely to see the effervescence).
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