1.50 Ct. Bi Color / Parti Sapphire from Ceylon (Sri Lanka)

This listing from The Natural Sapphire Company describes one transparent 1.50 carat oval shape bi color parti sapphire, with dimensions 7.32 x 5.78 x 4.30 mm. The gem is faceted with a mixed brilliant cut, yielding a balanced combination of facet patterns that enhance both scintillation and color play. Clarity is graded as very very slightly included, evaluated at eye level, indicating only minor inclusions that do not significantly impact visual performance. Color intensity is medium, displaying a parti of blue, green, and violet tones that shift with orientation and lighting, and the polish is excellent, contributing to clean facet junctions and consistent light return. The sapphire is heat treated, a common and stable enhancement that improves color uniformity, and it originates from Ceylon, Sri Lanka, a source known for producing sapphires with attractive tone and clarity profiles.

When integrating this bi color parti sapphire into a custom piece, consider design elements that both stabilize the stone and complement its multifaceted color character. For a classic solitaire setting, a low bezel or four prong mounting in platinum or 18 karat white gold will emphasize the cooler blue and violet hues, while an 18 karat yellow gold mounting can warm the appearance and bring forward the green and olive components. A halo of near colorless round brilliant diamonds, sized and spaced to follow the oval outline, will enhance perceived size and provide neutral contrast without competing with the parti tones. For a bicolored palette, small tsavorite garnets or mint green sapphires set on one side of a split shank or as calibrated side stones will draw out the green flashes, while pale cornflower blue sapphires or aquamarines will harmonize with the blue areas. Consider tapered baguette diamonds for a three stone ring design to maintain focus on the center oval, or a mixed cluster of melee in varying sizes to create textural contrast. The mixed brilliant faceting of the center stone responds well to settings that allow light to enter from both crown and pavilion, so designs with open galleries and minimal metal obstructing the pavilion will preserve brilliance and color dynamics.