About Us
Koin International – the trusted name in Diamond Tenders
Our Company
Koin International FZCO is a leading global diamond tender house and a top-tier member of the Dubai Diamond Exchange (DDE). We specialise in creating smart, agile sales strategies that maximise value for both suppliers and buyers in a highly competitive market.
What sets Koin apart is our relentless focus on innovation, data-driven solutions, and building strong, strategic partnerships. Our custom analytical tools and streamlined processes ensure that every parcel is placed in front of the right buyers — from a global network of over 2,000 pre-qualified clients.
We work across the full supply chain — from large-scale producers and mines to artisanal diggers — and handle everything from ROM and melee to single stones, fancy colours, and exceptional diamonds. Our expertise spans both rough and polished goods.
In an industry shaped by constant change, we remain ahead by listening to our clients, adapting quickly, and delivering secure, insightful and seamless tender experiences.
With Koin, you gain a partner committed to performance, transparency, and long-term success.
We don’t just run tenders — we set the benchmark.
Carats Sold
Sales Held
Global Locations
Our Team
Koin draws on years of irreplaceable hands-on experience within the industry, with a team who together combine over 95 years of experience in almost every area of production from source to retail. Our passion and expertise, along with the strategic relationships we build with our clients, makes us committed partners with our buyers and suppliers in achieving their business goals and successes.
Adam Schulman
CEO
Adam has over 25 years of business development and leadership experience in the diamond and jewellery industry, with an extensive global network at all levels from mines through to governments, manufacturers and retail. He is a keen entrepeneur who is internationally renown for spearheading the development of rough and polished diamond tenders over the last 19 years, acting as an industry disruptor in gem trading.
Adam has served on panels and as a keynote speaker for several industry events, and was an initiator of the DDE’s Tender Best Practice Forum – an industry first.
Martin Gill
Head of Operations
Martin possesses a wealth of experience and expertise in buying, pricing and assorting, including adapting to constant and often swift and volatile fluctuating market conditions.
With over 25 years experience in multiple aspects of the rough diamond trade, including an extensive background with a De Beers sightholder, Martin has a robust understanding of clients’ businesses, allowing him to efficiently understand and price rough diamonds of every kind. This enables Koin to handle large intakes of rough, and create very precise and tailored assortments for a large clientele.
Yoela Goldstoff
Office Manager
Kristel Menguito
Administration
Jacob Gill
Operations
Arslan Rehan
Operations
Renitha Devi
Accountant
Dave Joyce
Technical Operations
Jill Schulman
Project Manager
Our Story
Every diamond tells a story…
At Koin International, we don’t just sell diamonds. We are one chapter in the life of a diamond from its creation deep in the heart of the earth, to its final transformation as a sparkling symbol of eternity.
At every step along the way, we are invested in the people who bring this story to life. From our suppliers all over the African continent, the men and women who raise these minerals of hope from their dark origins into light; to our buyers who come from all corners of the earth, unleashing their vision and skills to create something magical; and to our staff who bring passion, expertise and excellence to this industry that is like no other.
The Koin story isn’t just about diamonds. It’s also about individuals, and the relationships we build. It’s about trust, integrity, commitment and respect. It’s about how to carry the story forward, together.
Become a part of the Koin story. And become a partner in bringing every diamond’s story to life.
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Contact
Phone
+ (971) 58 561 0203
Address
43A Almas Tower
JLT, Dubai, UAE
