1.90 Ct Deep Blue Triangle Mixed Cut Natural Sapphire

This striking 1.90-carat natural sapphire displays a rich deep blue color in a distinctive triangle mixed cut measuring 7.83 x 7.59 x 4.56 mm. The triangular shape offers a unique alternative to traditional cuts, creating dynamic visual interest with its geometric form and transparent clarity.

Certified by ALGT (Antwerp Laboratory for Gemstone Testing, report 55944437), this sapphire is identified as natural corundum. The certificate notes indications of heating and lattice diffusion treatment with titanium (Ti) from an external source—standard enhancement practices in the sapphire market that improve color intensity and uniformity.

The deep blue saturation and substantial carat weight make this sapphire suitable for distinctive custom jewelry where the triangular shape can be featured as a unique design element. The geometric cut offers modern appeal while the rich color provides classic sapphire beauty.