Question about unmarked earrings

So yes ill bore everyone with another question about some crappy costume jewelry lol well I think it is (def need to get more testing supplies). These were in my aunts storage and they are heavy a d seem to be well made .prettu and all but no makers mark. No markings at allZ but I’ve seen this pebbles design before and can’t put my finger on it as to what deaigner it is...can anyone help??

 

Are the stones "open" from the back in their settings?

 

John Hardy.

Debora

 

Hardy does a dotted pattern called Kali but it’s very different and mixes circular and non circular shapes.