Really like this. Like the large diamond at the bottom. Wouldn’t spend this much money on eBay though!

Diamond Necklaces
Good, Great, or just OK?
Diamond Necklaces 14k Gold Tiny Delicate Solitaire Diamond Necklace Trillion Diamond Wedding Set with a Dual Diamond Ring – 0.25 Carat Trillion…
Matching knot designed diamond necklace www.finditforwedd…

An opal and diamond brooch/pendant, circa 1890. The openwork cartouche of ribbon and floral design, set throughout with cushion-shaped, old brilliant and single-cut diamonds, and to the centre with a heart-shaped cabochon opal, suspending an opal drop, diamonds approx. 1.20cts total, later detachable brooch fitting,

Refer: Now