A Purpose for Scratching Minerals

Did you know that some minerals you can scratch with your fingernail? Frederick Mohs invented the scale of 1 – 10 hardness.  All minerals are now fit into this scale of hardness.  Higher numbers scratch any number lower than that number.  For example, 7’s will scratch 6’s, but 6’s will not scratch 7’s.  Finding out…

Where can Quartz be found?

(photo credit: I took a picture of my California Gold & Gems Maps from my Rockhounding California kit from northwestrockandfosil.com) My friend Noelle asked me a question and I couldn’t get the picture to work in the reply.  So, I decided to post it.  Quartz is the 2nd most abundant mineral in the earth’s crust.…