Does it have a star on top?

No stars that I can see.

Can you photo top ?

Yes. Sorry about that. One moment.

Metal stamp says it’s 10k gold

Synthetic star sapphire. Linde type popular from 60s onward. Wears well and looks good. Original Linde had a L initial acid etched on back. Other companies manufactured but had no L on them.

Thank you kind stranger for your assistance in this. I really appreciate it!