Rocks

I picked up this rock at Lubnaig on my travels on Saturday morning.
Looked interesting from the outside, but the plan was always to knock it with a mash hammer to see what was inside. 
It's a strange mix of slate, granite, marble, and with touches of iron oxide, or similar. 
*Fact Checker: Mr Mac is no geologist, this could be gibberish. ;-)
Mostly planting bulbs today, and enjoying the breezy weather.
I didn't think I'd end up breaking rocks during my hols, but here we are.