Radiant Cut Moissanite Ring, 1ct to 4ct in 925 Silver

Radiant is a rectangular cut with clipped corners, but unlike an emerald cut it is faceted like a brilliant, so it throws far more light. It sits between the two worlds. You get the clean, elongated outline of a step cut and most of the sparkle of a round, which is why it is a popular engagement shape. The clipped corners also resist chipping, and a four prong setting grips each of them securely.

The listing offers moissanite and zircon at every size, so choose the stone first. Moissanite is harder at 9.25 on the Mohs scale, so it keeps its polish through daily wear, and its refractive index of about 2.65 gives more fire than diamond's 2.42. Zircon is softer, less lively and will dull sooner, but it costs less and suits a ring you wear occasionally. The GRA certificate applies to the moissanite option only.

Four sizes cover the range. The 1ct at 5x7mm is a neat, everyday stone. The 2ct at 6x8mm is the balanced size most buyers choose. The 3ct at 7x9mm has real presence. The 4ct at 8x10mm is the largest and suits a longer finger. The band is 925 sterling silver, so the metal will not tarnish like brass. Ring sizes run in half steps, so measure your finger at the end of a warm day and order that size.

• Stone: radiant cut moissanite or zircon
• Sizes: 1ct 5x7mm, 2ct 6x8mm, 3ct 7x9mm, 4ct 8x10mm
• Metal: 925 sterling silver
• Setting: four prong solitaire
• Ring sizes: available in half sizes
• Note: the GRA certificate applies to the moissanite option only