Square sapphires — including princess cuts, square octagons, and square cushions — bring clean modern geometry to colored-stone jewelry. The 1:1 length-to-width ratio reads balanced and architectural, photographs beautifully head-on, and suits both art deco-inspired and minimalist modern designs.
Why square sapphires from Crescent Gems
Every square sapphire in this collection is hand-cut in our Sri Lanka workshop. The 1:1 outline demands precise corner alignment — even small asymmetries are immediately visible when the stone is set. The majority of stones are unheated; premium pieces ship with GIA reports.
Sub-types of square sapphires
Princess (square brilliant). Sharp-cornered square with a brilliant facet pattern. Maximum sparkle in a square outline. Requires four-prong or V-prong protection for daily wear.
Square octagon. Square outline with the four corners gently cropped. Combines stability with a modern geometric look.
Square cushion. Soft rounded corners with brilliant faceting. The most romantic of the square shapes.
Asscher. Square outline with deeply cropped corners and step facets. See our Asscher collection.
Engagement, modern design, statement pieces
Square sapphires suit clean modern aesthetics, geometric art-deco-inspired settings, and bezel-set designer rings. Designers value calibrated square pairs for matched accent work — see our matched pairs collection.
Have a question about a stone? Email crescentgems@gmail.com. 14-day return on every order. Select pieces are available for Try-On. Free US shipping; international shipping via FedEx and UPS.
