GRS-certified 4.13 carat heart-cut Sri Lanka blue sapphire with heat treatment is bezel-set in an 18K white gold heart-shaped pendant with a spider web gallery back and yellow gold prong accents, flanked by two round brilliant diamond stations on a 17-inch white gold cable chain, weighing 6 grams total. Pendant measures 17.5 x 12.5mm.

The 18K white gold pendant mounting is a masterwork of design refinement — a smooth, polished heart-shaped bezel frame holds the sapphire securely from the front while concealing one of the most extraordinary gallery details in fine jewelry design: a spider web lattice pattern crafted in openwork white gold that covers the entire reverse of the pendant, visible through the stone from the front and fully revealed when the pendant is turned over. This spider web gallery is not merely decorative — it serves as a structural cage that allows light to enter the sapphire from behind while protecting the stone's pavilion, and it creates a genuinely collectible, conversation-worthy reverse detail that most pendant designs completely neglect. The two diamond station settings flanking the pendant on the chain feature elegant navette-shaped bezel housings that give the chain its own distinctive jewelry character, ensuring the necklace is as interesting at its shoulders as it is at its center. Yellow gold prong tips visible at the sapphire's base add a deliberate two-tone warmth that flatters the blue sapphire's color from below.

This 4.13 carat heart-cut Sri Lanka blue sapphire is GRS-certified with confirmed Sri Lankan origin — a provenance that carries significant value in the colored gemstone market, as Ceylon sapphires from Sri Lanka are universally recognized as among the world's finest, prized for their characteristic velvety blue color with exceptional transparency and brilliance that distinguishes them from sapphires of any other origin. The heart cut is among the rarest and most technically demanding shapes in gemstone cutting, requiring the cutter to preserve maximum carat weight while achieving perfect bilateral symmetry in a shape that reveals any asymmetry immediately to the eye — a well-cut heart sapphire of this size is therefore a genuine testament to lapidary skill. Standard heat treatment has been applied to optimize color and clarity, a universally accepted and disclosed industry practice that does not diminish the stone's natural origin value. At 4.13 carats in a heart shape measuring 17.5 x 12.5mm, this sapphire is an extraordinary face-up size that fills the pendant frame with deep, saturated blue that is visible across any room.