Ten kinds of or names of rocks

Seeing as how I spent a couple years as a climbing bum, you‘d think I‘d know more about rocks. Heck, I don‘t even know the difference between a rock and stone (and I‘m not going to look it up). I think boulders are generally defined by their size - a small boulder is still quite a bit larger than a big rock. 

These are distinctions I never thought too much about before moving a new country and starting to learn a new language. Without running to a dictionary, I can talk about stones and gravel in German, and probably get across the idea that stone becomes gravel when it‘s roughly pea-sized and you‘ve got a lot of it…Can you have one piece of gravel? I think it‘s a collective noun, but if you go to a gravel pit and pick up just one piece, what have you got?

Enough, it‘s time for:

The photo

From the same walk as yesterday’s photo. Along Unter den Linden.

The List

1. Igneous

2. Granite

3. Sword-containing stones

4. The kind not to throw in glass houses

5. Skipping pebbles

6. Driveway gravel

7. Stolpersteine (not rocks, but brass)

8. Grandma and Grandpa Peabody (Bishop, CA)

9. The ones that get in your shoes and are really annoying

10. Turned-to-stone trolls