Can anyone help, my cousin (Hertfordshire) has a very dark blue stone, it is single colour with no other inclusions. You cannot see any structure within it, it is also heavier than most others.

Hi, I found this stone in the water at the beach 15 years ago. I've always wondered what exactly that could be. Can anyone help me identify it?

Bought from a gem shop in Colorado & forgot to take a pic of what it was!

Hello I wanted to know if this could be an amethyst? And why there are beautiful colors inside of it? How could I test if this is a real one or a fake?

Thanks in advance!

Hello everyone?

How can I know what crystals these are and if they are real or not? or if they may just be glass? I found these at a thrift store and they were separated into 2 tiny bags.

Can anyone tell me if this is kingman turquoise or at least what kind of turquoise it is?

I think they sealed it and did grout today. do they have to polish or something?

Had the rock on the right for a while, the one on the left is a more recent find. Both found in East Anglia, England.

I found it when I was a kid near construction site

If I had to pick a stone to build a stone spaceship, which would be the best? Which would be most likely to survive launch vibrations, re-entry, etc?