Moissanite Tennis Necklace, 2mm to 6.5mm in 925 Silver

A tennis necklace is a continuous line of matching stones on a flexible chain, and it is one of the few pieces that works on both men and women. The stones sit edge to edge, so the chain lies flat against the neck and moves with it instead of twisting. Wider stones sit higher on the collarbone and read as a statement, while the finer widths fall softly and can be worn under a shirt collar or layered with other chains.

Two stone options are offered, and the difference is honest. Moissanite is harder at 9.25 on the Mohs scale, so it keeps its polish, and it has a refractive index of about 2.65 against a diamond's 2.42, so it flashes more. Zircon is softer, less fiery and cheaper, and it is a sound choice for a gift or a layering piece that will not be worn daily. The chain itself is solid 925 sterling silver. The GRA certificate applies to the moissanite option only.

Choose the width by how the necklace will be worn. The 2mm and 3mm are fine lines that suit layering and daily wear. The 4mm is the balanced middle. The 5mm and 6.5mm are heavier statement necklaces that sit best on a longer neck or over open collars. Lengths begin at 22 inch (56cm) and 24 inch (61cm), so these are longer drops. Finishes are white gold, yellow gold or rose gold.

• Stone: moissanite or zircon, round cut
• Widths: 2mm, 3mm, 4mm, 5mm, 6.5mm
• Metal: solid 925 sterling silver
• Finish: white gold, yellow gold or rose gold
• Lengths: 22 inch (56cm), 24 inch (61cm) and other lengths
• Note: the GRA certificate applies to the moissanite option only