1. 🔎 UNIDENTIFIED Do all types of Quartz emit sparks when hit with steel?

    Will all kinds of Quartz emit sparks when they are hit with steel? What about quartz/quartzite that have rounded surfaces all over like the one shown in the picture? I learned that quartz do gives off sparks when hit by steel. But this one shown in picture do not sparks.
  2. Beach Rock ID... Save me from myself!

    Please help! A year ago I moved to Maine because I love beachcombing for seaglass. However, now I find myself obsessed with rocks, and I can’t stop bringing them home. Unfortunately I know little about them. I have read online, and looked at pictures and I’m just not getting the answers I...