The Gem World Team

At Gem World we believe that every customer deserves ethical gemstones with the best service, no matter the stone or price.

Our vision

Treating every client as a valued partner

Treating every client as a valued partner, Gem World is committed to providing the highest level of service. By personally selecting the gems at the source, we assure an outstanding quality and choice, at the right price.

Our dedication to our clients, and insight to their needs has made us one of the most respected and trusted players in the industry.

Ethically sourced Gemstones

As a accredited ethical member of ICA and our years of valuable experience coupled with a profound market knowledge has led to a transparent, and compact supply chain which we are proud of.

We strongly care for our environment, sustainable employment conditions, and strive to ensure you with fairness, traceability and transparency as it relates to your product requirements- which is our mission.

Meet the team

Guy Gorenstein

Guy Gorenstein joined Gem World in 2004, after his formation in cutting and polishing diamonds. He is specialised in diamond machinery from Belgium(WTOCD), diamond grading, rough diamonds and gemmology (HRD).

After his father, Jehuda Gorenstein (founder of Gem World), passed away in 2010, Guy took over the company and became the new director.

Maxime Ruelle

In 2016, Maxime joined the Gem World team after his training in cutting and polishing of gemstones. He is specialised in the reparation, recutting and repolishing of any type of coloured stones.

He is one out of few gem cutters in the city ofAntwerp and happy to help you with everything when it comes to reparation, recutting and repolishing of any types of gemstones.

Elinor Hassin

Elinor Hassin is the rock behind Gem World. She’s the loving wife of Guy Gorenstein and mother of three beautiful children. Since 2011 she has been helping out Guy with the administration of Gem World and in 2015 she graduated as accountant.

At the moment she’s following an ITAA stage to become a certified accountant. Next to her several hobbies, she also has a passion for gemstones.

Sarah Serapiglia

In 2021, Sarah Serapiglia joined the Gem World team as the new Sales Assistant. She is an enthusiastic young lady who is impatient to learn more about the beauty of gemstones.

Sarah was hired to keep up with the raise of clients orders. With a good knowledge of Dutch, French and English she is the perfect addition to our team.

Liam Proost

Liam Proost, nephew of director Guy Gorenstein, is Gem Worlds first pupil. Liam is a young and charming boy who, like most boys of his age, didn’t know what he wanted to do with his life.

Luckily, his uncle was able to make him curious about gemstones. Now, few months later, Liam is the pupil of Maxime Ruelle and a promising polisher to be!

Our history


Gem World was founded in 1982 by Jehuda Gorenstein, and immediately established itself as a key authority in the in the trade of gemstones.


In 2004, after his formation in cutting and polishing diamonds, Guy Gorenstein joined Gem World.


Jehuda passed away and his son Guy Gorenstein took over the company.


In 2016, Maxime Ruelle joined the Gem World team.


Proud to announce that Gem World is a member of SBD, Syndicaat der Belgische Diamantnijverheid.


Gem world becomes an ethical member of ICA in order to keep our vision to provide the stone at the right price from the right source.

As of 2021 Guy Gorenstein is a board member of SBD, hoping to protect and push our business in the best direction possible.