Sea glass jewelry experiment

Recently I've become fascinated by the colourful objects I find on my beach walks.  I stroll along, occasionally stopping to winkle out small smooth stones from the sand, especially excited if I spy the green gleam of sea glass, which I swoop on as if it was an emerald.

I love the idea of up-cycling these naturally available objects, so have begun experiments to feature them in jewelry.  I began with this green hand crocheted ring to test methods of holding the 'gem' in place.  It worked, but I've ideas that should improve it.