ABOUT US

Rare Gemstones from Around the World


With over 26 years experience, and with buying offices in Colombo (Sri Lanka) and in Chantaburi (Thailand), we are able to procure the finest and also rarest of gemstones, such as Diamonds, Emeralds, Rubies and Sapphires, available anywhere in the world. Our speciality is stocking important, natural gemstone pieces.

Now in 2022 and 26 years since the company began, Sico International is thriving in the centre of the UK’s Jewellery industry at Hatton Garden. Anthony Aziz, the director of Sico International is one of the premier authorities of Rubies and Sapphires within the jewellery industry and much of his knowledge and experience is passed on through his employees, ensuring that all of Sico’s customers are guaranteed to receive the highest standard of service.

If you would like to see how Sico International might be able to help you or to find out more information on any of the jewels stocked, contact Sico today by calling +44 (0)20 7831 3650 or email anthony@sicoint.net.

Sapphire Round 1.43 cts
Ruby Oval 2.02 cts (Part of a Pair)

Gemstone Certificates Recognised Worldwide


Our Rubies originate from Burma, Thailand and Africa (where we find some extraordinary natural unheated stones) and our Sapphires originate in Burma, Sri Lanka and also Madagascar. To a smaller degree, we have a fine stock of Emeralds that come from Colombia and also Brazil. Today in order to provide our clientele with the utmost confidence, we provide gemstone certificates recognised worldwide.

Pink Sapphire 2.99 cts

Gemstone Certified


Most of our gemstone stock both Ruby and Sapphire, usually 2-carat size and over, are certified, and for our unique pieces, we usually provide two or even three certificates for the same precious stone, from GRS, Gubelin, SSEF or C.Dunaigre (Swiss) Laboratories.

Gemstone Certifications Recognised Worldwide by SICO International, Gemstone Dealer London
Rare Rubies for Sale London

How can we help?

Sico International are experts in sourcing and buying the finest and rarest Rubies available anywhere in the world. Contact us and we'll be delighted to give you advice in helping you choose the right Rubies, Sapphires or Diamonds.