What r/whatsthisrock is talking about this week

This beautiful specimen was found by my dad while off-roading in Arizona 30ish years ago. It was my first inspiration in becoming a geologist (and now a PG) and my favorite rock in my collection!...

About 4 inches long, maybe 2 inches wide. Found on the beach near Warwick, Rhode Island. Grey side is sparkly. Very dense.

It's about the size of a thumb. Purple and partially transparent. I tried to scratch it with my nail but it didn't leave a mark. Mostly smooth to the touch. Has some debris inside?

Hello I believe its Flintstone but it has a weird Texture the Dark grey part is also risen The light grey parts are rough Back feels smooth and round As a kid i always thought it might be some...

For context dug this up in my backyard while working on a garden, I live in wa state, so I was curious if anyone knew about the red dots/grain in it!

I don’t think this rock is originally from Indiana, but I absolutely love it and was just curious if anyone can tell me what it is/what it’s comprised of.

Any ideas?

Hi all, I'm pretty sure I found this at a beach one day a few years ago and would love to hear any information about what it might be. It's smooth on one side, and the other feels very "rocky"...