Vintage Black Onyx and Diamond Ring by SIT Fine Jewelry I have this ring, it's my moms ;)
Victorian style black ring
OVAL CABOCHON BLACK ONYX RING / ginette ny
Black Onyx 14K Rose Gold Ring
Natural Black Onyx and Diamond Halo Engagement by MidPointDesign
vintage black onyx rings women | 14ct & platinum Art Deco onyx and diamond ring.
10K Antique Art Deco Two Toned Filigree Black Onyx Ring from Etsy, $229
Hey, I found this really awesome Etsy listing at http://www.etsy.com/listing/100007277/black-onyx-sterling-silver-ring-wire