Interchange earring studs in lapis onyx and malachite

Here we have:
Stone version of the silver and gold interchange earrings.

What’s the story?
I had some cut as samples to make cufflinks for Thomas Pink Ltd.

Details:
The stones are about 9mm across and come in carnelion, lapis, malachite and onyx. (Carnelion not pictured here)
The 9ct gold studs are 5mm beads and you can also wear them on their own.

Variations:
Apart from the silver and gold there are trillion and round stone ones to.