Curated Collections of Exceptional Gemstones

Faceted yellow gemstone with a radiant cut, reflecting light from multiple angles.

SICO International, nestled in the heart of London's renowned Hatton Garden, stands as a beacon for connoisseurs and collectors seeking the world's most exquisite gemstones. With over 26 years of experience, this family-run enterprise has cultivated a reputation for sourcing and supplying rare, certified gemstones that epitomise luxury and authenticity.

A Legacy of Expertise and Passion

Founded by esteemed gemologist Anthony Aziz in 1996, SICO International has grown into one of London's premier loose gemstone dealers. Anthony's profound expertise, especially in rubies and sapphires, has been instrumental in establishing the company's esteemed standing in the industry. Today, his sons continue this legacy, ensuring that clients receive unparalleled service and knowledge .

Curated Collections of Exceptional Gemstones

Rubies

SICO International offers a diverse range of rubies, primarily sourced from Mozambique, with selections also from Burma and Thailand. Their collection spans from 0.30-carat stones to significant pieces up to 15 carats, many of which are natural and untreated, showcasing the gem's innate beauty.

Sapphires

Their sapphire inventory includes gems from Sri Lanka and Madagascar, ranging from 0.30 to 20 carats. The collection features both natural and heat-enhanced stones, encompassing a spectrum of colors, including the coveted pink sapphires .

Diamonds

Through strong connections with major diamond houses in New York and India, SICO International extends its offerings to include high-quality diamonds, catering to clients seeking both coloured and colourless gems.

Rare and Unique Gems

Highlighting their collection is a remarkable 16.30-carat Madagascan ruby, noted for its exceptional luster and vivid red hue. This gemstone, accompanied by certification from renowned gemologist Christian Dunaigre, exemplifies the rare treasures SICO International provides .

Commitment to Quality and Certification

Ensuring authenticity and quality, SICO International provides certification for their gemstones from esteemed laboratories such as GRS, Gubelin, SSEF, and C. Dunaigre. This dedication offers clients confidence in the provenance and value of their purchases .

Personalised Service in the Heart of London

Located in the heart of Hatton Garden, London, SICO International invites clients to experience personalised consultations, offering expert guidance in selecting the perfect gemstone. Whether for investment, collection or bespoke jewelry, their team ensures a tailored experience to meet individual preferences and needs.

Connect with SICO International

Discover the world of rare and precious gemstones with SICO International. For inquiries or to schedule a consultation, contact them at +44 (0)20 7831 3650 or via email at anthony@sicoint.net.

Experience the pinnacle of gemstone excellence with SICO International—where tradition meets unparalleled quality.