piddler
Greenie
I hate to be a dummy, but can someone ID this rock for me?
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Try scratch it with a knife, calcite has 3 on mohs scale and a knife has 5.5 the knife should then scratch your specimenTRHunter said:What you have looks like a big ol piece of calcite. To verify drop some vinegar or swimming pool acid on it and if it fizzes that's what you have. To make it shiny soak in dilute swimming pool acid but don't breath that stuff.