Showing 9 of 9
Princess Cut Loose Diamonds
プリンセスカットダイヤモンドルース
-
Natural Loose Natural Diamond 1.011ct Near Colorless H Princess-cut
Regular price ¥572,000 (Tax incl.)Unit price per -
Natural Loose Natural Diamond 1.029ct Colorless E Princess
Regular price ¥960,000 (Tax incl.)Unit price per -
Natural Loose Natural Diamond 0.7ct Colorless E Princess-cut
Regular price ¥370,000 (Tax incl.)Unit price per -
Natural Loose Natural Diamond 3.0ct Colorless D Princess-cut
Regular price ¥6,650,000 (Tax incl.)Unit price per -
Natural Loose Natural Diamond 1.787ct Colorless E Princess-cut
Regular price ¥1,780,000 (Tax incl.)Unit price per -
Sold outNatural Loose Natural Diamond 0.638ct Fancy Light Yellow Princess-cut
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Natural Diamond 1.07ct Fancy Yellow Princess-cut
Contact us for price inquiry.
Sold out -
Sold outNatural Loose Natural Diamond 0.912ct Faint Yellow K Princess-cut
Regular price ¥250,000 (Tax incl.)Unit price perSold out -
Sold outNatural Loose Natural Diamond 3.097ct Near Colorless I Princess-cut
Regular price ¥4,268,000 (Tax incl.)Unit price perSold out
How to Choose a Princess Cut Loose Diamond
What Is a Princess Cut Diamond
The princess cut was developed in the 1960s and 1970s and represents one of the most technically sophisticated of all diamond shapes. Its sharp square or near-square outline houses approximately 76 brilliant-cut facets — more than round brilliant cut's 58 — arranged in a way that produces exceptionally strong sparkle from a geometric frame. Unlike step-cut shapes such as emerald, which produce a quieter hall-of-mirrors effect, princess cut delivers fire and brilliance very close to what round cut achieves, while presenting a distinctly modern, architectural profile from above. In loose form, princess cut allows you to assess the stone's exact proportions — how close to square it reads, how uniformly the facets are arranged, and importantly, the condition of the four corners before committing to a setting. Our princess cut loose collection spans colorless and fancy color, with GIA and CGL certification, centered on E color in VS1 and VS2 clarity.
Corner Protection and Setting Considerations
The four sharp corners of a princess cut diamond are the shape's most important practical consideration. Because the corners are acute angles extending to a fine point, they are structurally more vulnerable to chipping than rounded shapes like round, cushion, or oval. This is not a reason to avoid princess cut — it is simply a design requirement for the setting. V-prong settings (also called corner prongs) enclose each corner in a V-shaped metal seat that protects the point while preserving the stone's visibility. Bezel settings offer even more complete protection but enclose more of the stone's perimeter. Both are standard solutions; which to choose depends on aesthetic preference and intended wearing frequency. On color, princess cut can concentrate a slight warmth at the corners, making D through F color the recommended range for white gold or platinum settings. In yellow gold, G through H color reads naturally and offers strong value. Clarity of VS1 to VS2 is recommended for engagement ring center stones.
From Loose Stone to Custom Ring
After selecting a princess cut loose diamond, our craftsmen can create a custom ring built around the stone's specific proportions and your preferred setting style. A V-prong solitaire in platinum is the cleanest expression of the shape's modern geometry. A square halo — with small round or princess cut accent diamonds arranged in a square perimeter around the center stone — amplifies the stone's presence significantly. Three-stone designs with matching princess cut side stones create a strong architectural statement. We work in 18K white gold, yellow gold, rose gold, and platinum, and can produce a design sketch before committing to production. Princess cut also works well for fancy color diamond custom orders — yellow princess cut diamonds in yellow gold settings in particular combine the shape's geometric modernity with the warmth of the stone's color to strong effect. Browse our statement diamond ring collection for finished princess cut examples, or contact us to discuss a custom order.
Frequently Asked Questions
A princess cut diamond has a sharp square or near-square outline with approximately 76 brilliant-cut facets — more than round brilliant cut's 58. It produces strong sparkle and fire comparable to round cut, while presenting a distinctly modern, geometric profile. The four sharp corners are the shape's defining feature and require appropriate corner protection in the setting.
The four acute corners of a princess cut diamond are structurally more vulnerable to chipping than the rounded edges of shapes like round, cushion, or oval. This is a practical consideration that must be addressed in the setting design rather than a reason to avoid the shape. V-prong corner settings or bezel settings are the standard solutions, enclosing each corner in protective metal. With appropriate setting, princess cut diamonds are entirely suitable for daily wear including engagement rings.
Princess cut diamonds can concentrate a slight warmth at the four corners, making D through F Colorless grades the recommended range for white gold or platinum settings where color visibility is highest. In yellow gold settings, G through H Near Colorless grades appear naturally and offer strong value. Our current princess cut loose collection is centered on E color — the second highest colorless grade.
Yes. All princess cut loose diamonds at Weiss carry GIA or CGL certification, documenting color grade, clarity, and carat weight. Note that GIA does not issue a formal cut grade for princess cut — that applies only to round brilliant cut. Assessing the facet arrangement and corner condition in person is the best way to evaluate cut quality for princess cut.
Yes. After selecting a princess cut loose diamond, our craftsmen can create a custom ring in your preferred setting style — V-prong solitaire, square halo, three-stone, or other designs — in 18K white gold, yellow gold, rose gold, or platinum. V-prong or bezel settings are recommended to protect the corners. We can produce a design sketch before committing to production. Contact us to discuss your requirements.
Yes. Our appointment-only office is in Okachimachi, Tokyo. For princess cut in particular, viewing in person allows you to assess the condition of the four corners, the exactness of the square proportion, and how uniformly the facets handle light — details that are difficult to evaluate from photographs alone. Please book an appointment through our contact page or by phone.
Yes. Princess cut's geometric, modern silhouette works well with fancy color diamonds — particularly yellow, where the square shape combined with a yellow gold setting produces a clean, contemporary look that showcases the stone's color with strong presence. Pink and green princess cut diamonds are also effective in both warm and cool metal settings. Contact us for current fancy color princess cut availability.