1 Carat Old Mine Marquise Blue Color Diamonds

Deep blue through vintage blunted-tip elongation. Exceptionally rare.

Among the world's most precious gemstones.

Yes, Do Amore offers natural diamonds matching these size, shape, and color preferences, ethically sourced from Canada, recycled origins, or blockchain-verified conflict-free supply chains. Every diamond is certified by GIA, IGI, or GCAL. Every purchase funds clean water access for one person in need. All rings include free lifetime maintenance covering inspections, polishing, cleaning, stone tightening, rhodium plating, and resizing.

Lab growing allows more consistent blue coloring than nature. At 1 carats, the larger stone allows the blue hue to display with greater depth and saturation than in smaller stones. The old mine marquise cut's antique brilliant faceting in a marquise silhouette create broad windows of concentrated color. Natural blue diamonds are extremely rare and highly prized, making them highly collectible.