Deil Isac & Co.: A New Signature, the Same Family Excellence
19 Dec 2025
The story of the Deil family is one of passion, expertise, and integrity in the world of diamonds and fine jewellery, spanning three generations and now looking confidently toward the future.
It all began in 1954, when Ismail Deil founded the family business, quickly entering the diamond trade thanks to his deep market knowledge and an ethical approach to business that would define the company’s values for decades to come. In 1960, he was joined by his son Yusef Deil, member of the Italian Diamond Exchange since 1972, who became over the years a highly respected figure in the industry.
In 1985, the third generation entered the business with Isac Deil, a gemmologist certified by the International Gemmological Institute of Antwerp and a member of the Italian Diamond Exchange since 1995. Together, they founded Deil Joseph Srl. For more than thirty years, the company has supplied some of the finest jewellery boutiques in Italy and abroad, creating collections that balance Italian goldsmithing tradition, exclusive design, and a constant pursuit of excellence. To this day, Isac Deil personally selects diamonds and precious gemstones in the world’s leading trading hubs - from Antwerp to New York, from Bangkok to London and Paris - working directly with top sightholders.
In 2024, Deil Isac & Co. was born: a new brand representing the natural evolution of this long-standing family heritage. Strongly envisioned by Isac Deil, the project was created to actively involve the fourth generation of the family and to provide a creative space where tradition and innovation can meet.
Isac explains,
“Just as my father and grandfather did with me, I wanted to create an environment in which my children could build their future, bringing new ideas and a contemporary vision of jewellery.”
Deil Isac & Co. distinguishes itself from Deil Joseph through a more modern and dynamic language. While remaining firmly rooted in Italian high jewellery, the brand looks ahead experimenting with new materials, innovative alloys, unconventional cuts, and original gemstone combinations designed for a younger, international audience. Particular attention is also given to digital communication and brand identity, with an active social media presence and a strong, cohesive visual aesthetic.
Within this new ecosystem, the projects founded by Isac Deil’s children also find their place. JDD Diamonds, founded by Josef Daniel Deil, focuses on diamond trading and stands out for its online stock platform, which makes the purchase of diamonds more accessible and transparent. Jonathan and Tal Deil are the creative forces behind collections with a fresh and contemporary spirit: YOUNG by Jonathan and Deil Isac & Co. by Tal reinterpret jewellery through a modern and creative lens, while maintaining the quality and attention to detail that have always defined the family tradition.
Already active in the UK market with a loyal client base, Deil Isac & Co. sees the United Kingdom as a key area for future growth. Joining the National Association of Jewellers represents a natural step in this journey - an opportunity to strengthen relationships, expand the company’s network, and further enhance the international reputation of the brand. The brand is no stranger to the NEC Spring Fair: through the family company Deil Joseph Srl, the Deil family has been attending and exhibiting at the show for many years, building strong relationships and a deep understanding of the event and its international audience. Exhibiting at the NEC Spring Fair 2026 for the first time under the Deil Isac & Co. name therefore represents both continuity and evolution, marking a new chapter built on long-standing experience.
Deil Isac & Co. will be exhibiting at Stand SG34, where visitors will be invited to discover a carefully curated selection of collections: from classic and timeless designs that reflect the house’s heritage, to unique one-of-a-kind pieces, alongside a preview of new, more youthful creations that express the brand’s forward-looking spirit.
This participation therefore marks an important milestone: not only the official exhibition debut of Deil Isac & Co., but also a meeting point between a long-established family heritage and a new vision of contemporary jewellery - ready to engage with the international market and the next generation of industry professionals and customers.
View Deil Isac & Co.
Source: Deil Isac & Co.