marquise cut lab Grown diamond necklace
Marquise lab-grown diamond necklaces in 18K solid gold, every centre stone GIA-certified. Marquise diamonds have the largest surface area per carat of any shape.
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A marquise lab-grown diamond necklace is the right choice when you want a distinctive centre-stone shape on an everyday necklace. Marquise diamonds have the largest surface area per carat of any shape. A 1 ct marquise reads substantially larger than a 1 ct round.
Why the marquise shape works on a necklace
On a necklace, the shape of the centre stone has more visual impact than on an earring because the eye rests on it for longer. A marquise cut reads unmistakable against the skin.
Chain length and setting
18 inches is our default. Sits just below the collarbone, works with most necklines. We recommend a four-prong or bezel setting for a clean look, with a spring-ring or lobster clasp depending on chain weight.
Related necklace collections
Browse all lab-grown necklaces, natural diamond necklaces, and pendant necklaces.
Lab-grown diamonds are chemically identical to mined diamonds and cost roughly 40–60% less, so every carat weight becomes more accessible. Every centre stone above 0.30 ct is GIA-certified and laser-inscribed with its grading report number.
What comes with every piece
GIA grading report for the centre stone where applicable, a formal appraisal for insurance on pieces over $1,000, 18K solid gold in yellow, white or rose (hallmarked), and our lifetime cleaning and prong-check service. Every order ships in a signature Riyanika box.
Bespoke
Not seeing the exact combination you want? Every Riyanika piece can be made bespoke at no extra cost on most designs. Start your design here and we will send a CAD render for your approval before any gold is cut.
Frequently Asked Questions
Why choose a marquise cut for a necklace?
Marquise diamonds have the largest surface area per carat of any shape. A 1 ct marquise reads substantially larger than a 1 ct round. On a necklace specifically, the shape reads more clearly than on earrings because the eye rests on the pendant.
What length chain suits a marquise pendant?
18 inches is our default and works with most necklines. 20–22 inches drops the pendant lower and works well for v-necks.
Is a marquise pendant bespoke available?
Yes. Choose the carat weight, setting type, chain length and metal colour. We CAD-render every bespoke piece before making it.
Is the chain solid gold?
Every Riyanika necklace chain and pendant is 18K solid gold, hallmarked. We do not do plated or gold-filled.
Is the diamond GIA-certified?
Every centre stone above 0.30 ct is GIA-certified and laser-inscribed with its grading report number.
Can I return or resize the necklace?
30-day returns on non-bespoke necklaces. Chain lengths can be adjusted at any time. First adjustment within 60 days is free.