The Carat Club

The Carat Club: certified diamonds and gemstones for jewellers and designers

The Carat Club is a UK-based supplier specialising in melee-sized diamonds — both natural and lab-grown — certified diamonds, matched pairs and coloured gemstones. The company presents itself as a supplier to jewellers and designers worldwide, offering wholesale prices, international shipping and free delivery within the UK.

Lab-grown diamond catalogue

The lab-grown diamond range includes calibrated melee in a wide variety of cuts: round, cushion, pear, oval, marquise, heart, princess, radiant, emerald, baguette, tapered baguette, asscher, trilliant and trillion, among others. IGI-certified diamonds are also offered in classic and fancy cuts, with options in blue, pink, yellow and green colours, each in multiple shapes such as round brilliant, cushion, elongated cushion, emerald cut, marquise, oval, pear and radiant.

Natural diamonds and certifications

In the natural diamond section, the catalogue covers natural melee in round, baguette, emerald, marquise, oval, pear, princess and black round cuts, as well as GIA and CanadaMark certified round brilliant diamonds. The company states that all diamonds it supplies are fully compliant with the Kimberley Process and come exclusively from audited, highly reputable suppliers. It also indicates that lab-grown diamonds are produced using verified sustainable practices, with full traceability and ethical sourcing.

Coloured gemstones

The coloured gemstone catalogue includes natural sapphires in blue, pink, green, teal, yellow, purple and white tones, in round, oval, pear, octagonal, princess and marquise cuts. Natural emeralds, natural rubies, amethysts, peridots, tanzanites and tsavorites are also offered in various shapes and carat weights. In addition, there is a section for lab-grown coloured melee with options in blue, green, pink and yellow in various sizes.

Matched pairs

The company sells matched pairs of both lab-grown and natural diamonds. For lab-grown, available shapes include round, asscher, baguette, cadillac, cushion, emerald cut, half moon, heart, kite, marquise, oval, pear, princess, radiant, tapered baguette, trapezoid (brilliant cut and step cut), trilliant and trillion. For natural, pairs are offered in round, baguette, emerald, heart, marquise, oval, pear, princess, tapered baguette and trapezoid cuts.

Services and commercial terms

The company states that it does not require minimum orders and applies transparent pricing. Calibrated melee is precisely graded to ensure uniform size and reliable setting. According to the website information, orders are dispatched quickly and free shipping is offered within the UK, as well as free international shipping on orders over £50. Volume discounts also apply: up to 15% off when purchasing five or more gemstones. The returns policy is 30 days. In addition, the company offers personalised assistance to find the right stone and provides guides on diamond shapes and the concept of melee, as well as a custom cutting service.

Customer profile

Testimonials on the site mention repeat purchases by jewellers, including lost-wax casting professionals, who value the quality-price ratio, customer service and the speed and security of shipping. The company positions itself as a trusted supplier for workshops and designers who need a regular supply of diamonds and gemstones.

Location and contact

Phone: 07593527543 · Email: info@thecaratclub.co.uk · Hours: Open every day, from 00:00 to 23:59.