I would wear this but it is also a very masculine piece. I really had to hold it up to the sun to be able to see the deep olive green in it but there is also a rich stripe through it. I have no idea what it originally was... but very cool anyway. You can sure see the signature frosting that genuine sea glass acquires here....
I make the pendants on a single piece of Sterling wire with a loop on the top that can accommodate most average size chains if you wish to switch it out. It will come on an adjustable sliding knot cotton cord.
All the sea glass I use is just how I found it (except for drilling a small hole). You can't make genuine sea glass in a machine as it takes years and years to be smoothed by the wind, waves and sand, also the surface forms a unique and layered frosted surface that captures the light with so much more texture.
You'll see the measurements on the second photo. This one is almost 5 cm or 2 inches long.