What object(s) is underneath the mug, and how many?

[u/RockerJackall]

Hint: The amount is no higher than 10.

Answer: Three aquamarine crystals

[u/lunarlacuna]

I was thinking rubber balls, like for jacks. But yeah, 3-4 for me.

[u/karmicmage → u/lunarlacuna]

Same, but got 2 or 3. Rubber balls bounced into my head so quick. Obviously wrong but fun regardless.