Genuine Dragon Agate Stone Necklace With Gemstone? Cross Pendant Religious Christian Catholic

This is a simply gorgeous yellow dragon agate stone necklace with a gemstone? cross pendant. I don't know what the faceted stones on the cross. Perhaps green tourmaline? I am not a gemstone expert.

I thought the cross and clasp may be sterling, but there aren't any marks. It appears hand made, but professionally made. So this may be why it isn't marked?

It has some weight to it!

It measures 20" long, not including the 3" chain and bead at the end. The cross pendant is 1 1/2" long. Excellent shape.

The cross is permanent, there is no way to remove it.