Ring id

Hi i know it's no antique but was hoping for info on mark on this ring. I have tried to take as best photos as possible. Can make out the 75 but not sure on first symbol and I would have it a guess cubic zirconia in front cheers

 

maybe,....875....21 K gold ??
Then the stones would be real....

 

Looks more like 375, 9K gold rhodium plated.

 

Thanks for that ignore my ignorance does that mean looking at it it is a decent quality or run of the mill c

 

The mark doesn't make sense to me, I don't see an 8 or a 3.
It seems to be a maker's or manufacturer's mark, with 75. If 75 stands for 750, the ring would be 18k gold.

Tried it the other way around, doesn't make sense either.

 

I'm seeing 375 too.

 

that's a really ugly 3...but the 5 is no looker either...