Welcome to Rêve Diamonds, your trusted GIA certified diamond dealer in London. We specialise in providing the finest wholesale diamonds, offering you unparalleled quality at unbeatable prices.
A 6 carat marquise cut lab-grown diamond features a narrow, boat-shaped silhouette with pointed ends that maximises apparent size and elongates the finger. Its elegant, elongated shape has made it a distinctive choice for vintage-inspired engagement rings since the 18th century. A 6 carat stone of this kind is a rare, dramatic centrepiece — most jewellers handle only a handful of loose diamonds this size each year.
Lab-grown diamonds are real diamonds, produced in high-tech labs that replicate natural geological conditions. They match mined diamonds in chemical composition, physical properties, and optical brilliance — the only difference is how they're formed. Lab-grown diamonds offer excellent value, often costing 30% to 50% less than mined diamonds of the same quality.
At Rêve Diamonds, we offer a wide range of lab-grown diamonds that are certified by leading gemological institutes such as IGI or GIA, ensuring authenticity and quality with every purchase.
Call us on 020 3585 2395 or chat with our diamond experts to find your perfect 6 carat marquise cut lab-grown diamond today.
Prices typically range from £6,020 to £24,950, depending on specifications such as cut, colour, and clarity.
A 6 carat diamond weighs around 1.2 grams (1,200 milligrams), regardless of shape.
Marquise cut diamonds are elongated with pointed ends. Typical dimensions are:
Length: 17.6mm – 18.7mm (average 18.2mm)
Width: 8.5mm – 9.6mm (average 9.1mm)
Depth: 5.6mm – 6.7mm (average 6.2mm)