Shop › Green Onyx Necklace Image 1 of 1 Green Onyx Necklace $64.00 Sold Out Handmade by Hallie’s Comet Fine Jewelry in Massachusetts.All jewelry is made with either sterling silver or gold-filled. Sold Out Added! Handmade by Hallie’s Comet Fine Jewelry in Massachusetts.All jewelry is made with either sterling silver or gold-filled.