Cutting Styles: Brilliant Cuts vs. Step Cuts
Every diamond shape falls into one of two primary cutting families:
• Brilliant Cuts (Round, Oval, Cushion, Radiant, Pear, Princess, Marquise, Heart): Feature triangular and kite-shaped facets radiating outward from the center. This design maximizes light reflection, fire, and sparkle, and tends to mask small inclusions effectively.
• Step Cuts (Emerald, Asscher): Feature parallel rectangular or square facets that resemble a staircase. Step cuts emphasize exceptional clarity, optical transparency, and clean geometric lines rather than intense facet scintillation.
Detailed Comparison of the Ten Shapes
• Round: The classic circular silhouette with 57 or 58 facets mathematically engineered for maximum brightness and fire.
• Oval: An elongated brilliant cut that flatters the finger and creates an illusion of greater carat size due to expansive surface area.
• Emerald: A rectangular step-cut with cropped corners, showcasing an elegant 'hall of mirrors' aesthetic.
• Cushion: A square or rectangular shape with softly curved corners, offering vintage warmth with modern brilliance.
• Radiant: Combines the emerald outline with a fiery brilliant facet pattern, creating vibrant light reflection with cropped corners.
• Pear: A teardrop silhouette with one rounded end and a tapered tip, combining round brilliance with marquise elongation.
• Princess: A crisp square silhouette with pointed 90-degree corners and dynamic facet scintillation.
• Asscher: A square step-cut featuring high crown angles, deep windmill facet patterns, and art-deco appeal.
• Marquise: An elongated boat-shaped silhouette with pointed ends, offering the largest face-up surface area per carat of any shape.
• Heart: A romantic, distinct silhouette requiring master cutting symmetry to ensure balanced lobes and a well-defined cleft.
Length-to-Width Ratio and Finger Coverage
For non-round shapes, the length-to-width ratio (L:W) defines whether a stone appears compact or slender:
• Oval: Traditional preference is 1.35–1.50 for balanced elongation.
• Emerald Cut: Classic proportion is 1.30–1.45; higher ratios create an elongated look.
• Pear: Typical range is 1.50–1.70.
• Marquise: Traditional range is 1.75–2.15.
Remember that ratios are matters of personal aesthetic choice. There is no universally 'correct' ratio—your eye and preference are the ultimate judges.