Identification Guide
This is a basic club guide only. It is not a substitute for a proper geology reference, but it can be useful at the kitchen table after a field trip.
- Try a simple Mohs hardness check before guessing by color alone.
- A streak plate can be more helpful than surface shine on weathered samples.
- If it fizzes with weak acid, write that down before washing the specimen.
- Label the location as soon as you bag a find. We keep forgetting otherwise.