Four-Prong Low Peg Setting Solstice Solitaire® Mounting with Bombé Peg Shank. Four-Prong, Low Setting. Bombé Peg Shank. Matching band #50113 sold separately. Diamond sold separately. Available in 14K two-Tone Gold Gold or 14K White Gold.Solstice Solitaire® is the hallmark of a true classic, timeless design. The clean lines and balanced proportions of the Solstice Solitaire® creates a look that is elegant, understated, and refined, distinguishing it from every other engagement solitaire. The Solstice collection consists of five settings featuring lower to taller profiles, each created in four and six-prongs and combined with bombé, knife-edge or comfort fit bombé shanks and bands.