Onyx or glass?

[kali_is_my_copilot]

Picked these Ed Levin sterling earrings at the Salvation Army today for seven bucks. I can't find them online anywhere and need to determine what material this is for eBay listing purposes. Leaning towards glass because the design appears to be acid-etched but I'm just not sure, any ideas?

 

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[dumpsterdiver]

I would guess its not glass. Seems like a lot of trouble to etch glass and then set it in sterling. Glass is a pain to grind and very few adhesives that work with it. So its normally set and usually faceted. But almost impossible to tell from a photo. I guess if you were bold you might could try to scratch it with some glass but that seems a little risky. Maybe a loupe??

 

[stefen]

Bakelite is used a lot in jewelry...

 

[diggummup]

Being as how they are Ed Levin, I would say they are black onyx. They are a quality jewelry designer and I don't believe they use glass in any of their pieces. Not that there aren't quality pieces of jewelry that have glass stones, I just don't see glass stones being mentioned in any of their pieces, anywhere.