What are these details and what can causes them?

[MrZun]

I know the coin is Authentic, but i Wonder what can make ancients Coins have these random dots and details, is It from the die from using them todo much or dirt going in them? There is Also a slight elevation in the rev.

[Kali]

Sometimes it's called a "Clogged" Die.

[-monolith-]

Die debris, the spot on the reverse could be a cud (larger piece of die debris).  This Hadrian has just about every minting error you could want, or don't want, on a single coin:

Edited September 5 by -monolith-

[ominus1]

.you have to admit those make the coin unique 🙂