The Sugar collection is one of the most recognisable jewellery lines produced by the Geneva-based house de Grisogono, founded in 1993 by Fawaz Gruosi. Launched in the early 2000s, Sugar distils the house's core aesthetic convictions into a coherent design language: densely clustered coloured gemstones — principally pink sapphires, tsavorite garnets, and amethysts — set against blackened gold or titanium, with pavé-set white diamonds deployed as luminous counterpoint. The result is jewellery that reads simultaneously as organic and opulent, evoking the irregular geometry of mineral crystal formations rather than the symmetrical formalism of classical European high jewellery. The collection became a commercial and critical signature for de Grisogono during the house's most expansive period, and it remains a reference point for understanding how coloured-stone jewellery design evolved in the first decade of the twenty-first century.

Fawaz Gruosi and the de Grisogono Design Philosophy

To understand Sugar, one must first understand Gruosi's broader approach to gemstones and jewellery. Born in Florence and trained within the Italian and Swiss luxury trade, Gruosi founded de Grisogono with an explicit ambition to challenge the dominance of colourless diamonds in high jewellery and to rehabilitate coloured stones — particularly those considered secondary or commercial by the established Parisian maisons. He was among the earliest major designers to champion black diamonds as a primary material rather than a curiosity, and this appetite for the unconventional extended to his treatment of coloured stones: he favoured saturation over delicacy, abundance over restraint, and chromatic contrast over tonal harmony.

The Sugar collection emerged directly from this philosophy. Where a traditional high-jewellery approach might isolate a single exceptional sapphire or tsavorite as a focal point, Sugar multiplies: stones are clustered in such density that individual gems become components of a larger chromatic mass, their collective colour more powerful than any single specimen could achieve. The name itself — Sugar — evokes granularity, crystalline texture, and a kind of sweet excess that is entirely deliberate.

Gemstones: Selection and Chromatic Strategy

The three principal gemstone materials in the Sugar collection each contribute distinct optical qualities to the overall effect.

• Pink sapphires (corundum, Al₂O₃, coloured by trace chromium and iron) provide the collection's warmest register. The stones used in Sugar are typically calibrated in small to medium sizes — often ranging from approximately 2 mm to 6 mm — to facilitate the dense pavé-style clustering that defines the aesthetic. Pink sapphires from Madagascar and Sri Lanka, both major sources of the variety, offer the range of saturation — from pale rose to vivid magenta-pink — that the collection's colour gradients require. Their hardness of 9 on the Mohs scale makes them well suited to the close-set mounting styles employed, which expose stones to lateral contact.
• Tsavorite garnet (grossular garnet, Ca₃Al₂(SiO₄)₃, coloured by vanadium and chromium) contributes the collection's most vivid greens. Tsavorite, sourced principally from the Tsavo region of Kenya and Tanzania, is notable for a refractive index (approximately 1.734–1.759) and dispersion that give it exceptional brilliance relative to its size — a property that makes even small calibrated stones visually active within a dense cluster setting. The contrast between tsavorite green and pink sapphire pink is a recurring chromatic pairing in Sugar pieces, exploiting simultaneous colour contrast to intensify both hues.
• Amethyst (quartz, SiO₂, coloured by iron and natural irradiation) appears in Sugar pieces requiring a cooler, more violet-purple register. Amethyst's relative softness (Mohs 7) is compensated for by the protective geometry of the cluster settings, which distribute mechanical stress across multiple stones rather than exposing any single gem to concentrated impact.

White diamonds in pavé setting serve a structural and optical function beyond mere decoration: their colourless brilliance creates visual breathing space within the chromatic density of the coloured stones, and their faceted surfaces scatter light in directions that amplify the overall luminosity of the piece. De Grisogono's use of pavé diamonds in this context is less about diamond content as a value marker and more about optical engineering — a distinction that reflects the house's consistent prioritisation of visual effect over conventional luxury signalling.

Materials: Blackened Gold and Titanium

The choice of blackened gold and titanium as primary metal materials in the Sugar collection is as deliberate as the gemstone selection. Blackened gold — typically yellow or white gold treated with a black rhodium plating or a chemical patination process — provides a dark ground that maximises the chromatic contrast with the coloured stones set above it. Against a conventional yellow or white gold mount, pink sapphires and tsavorites read as bright but contextually familiar; against a black ground, the same stones appear to glow with an intensity that approaches luminescence. This is a straightforward application of simultaneous contrast — the same optical principle that makes a coloured stone appear more saturated when surrounded by its complementary colour or by neutral darkness.

Titanium, used in certain Sugar pieces, offers additional advantages: its exceptional strength-to-weight ratio allows for larger structural forms without the mass penalty of gold, and its natural grey-silver tone can be anodised or treated to produce surfaces ranging from matte grey to deep black. Titanium's biocompatibility and corrosion resistance are secondary benefits in a jewellery context, but its relative lightness is a genuine functional consideration in large cuff bracelets and statement necklaces — formats that the Sugar collection favours.

Design Language: Organic Asymmetry and Crystalline Form

The formal vocabulary of the Sugar collection departs significantly from the bilateral symmetry and geometric regularity that characterise most European high-jewellery traditions. Sugar pieces — whether rings, bracelets, earrings, or necklaces — are typically asymmetric in silhouette, with stone clusters that appear to grow or accumulate organically rather than being arranged according to a predetermined geometric plan. The visual analogy to mineral crystal formations or to the irregular surface of raw sugar crystals is not incidental: Gruosi has consistently cited natural mineral forms as a primary design reference, and the Sugar collection represents one of the most sustained explorations of that reference in his body of work.

This organic asymmetry has practical implications for production. Unlike jewellery designed around repeating geometric modules, Sugar pieces require individual hand-setting of each stone in a configuration that may not be precisely replicated across examples. The density of setting — stones placed in immediate adjacency, with minimal visible metal between them — demands exceptional skill from the setter, who must maintain consistent stone height and orientation across irregular three-dimensional surfaces. De Grisogono's Geneva atelier, which handles production of the house's high-jewellery pieces, is known for maintaining the craft standards that this level of complexity requires.

Production and Market Positioning

Sugar pieces are produced in limited quantities, consistent with de Grisogono's positioning as a high-jewellery house rather than a volume manufacturer. The collection is sold through de Grisogono's boutiques — historically located in Geneva, Paris, London, Rome, Gstaad, Moscow, Dubai, and other major luxury markets — and through a small number of authorised high-jewellery retailers. Pricing for Sugar pieces reflects both the gemstone content and the labour intensity of production; significant Sugar bracelets and necklaces have appeared at auction and in secondary-market sales at price points consistent with other Geneva high-jewellery houses.

The collection occupies a specific position within the broader high-jewellery market: it is neither the ultra-conservative classical tradition of certain Parisian maisons nor the conceptual avant-garde of a handful of independent designers, but rather a confident middle ground that prioritises chromatic spectacle and tactile richness within a recognisably wearable format. This positioning proved commercially effective during the 2000s and 2010s, when a global appetite for coloured-stone jewellery — driven partly by growing markets in the Middle East, Russia, and Asia — aligned well with the Sugar collection's visual language.

Legacy and Influence

The Sugar collection's influence on subsequent coloured-stone jewellery design is difficult to quantify precisely, but several of its formal strategies — the use of dark metal grounds to intensify coloured stones, the embrace of asymmetric organic clustering, the deployment of multiple coloured-stone varieties within a single piece — have become more widely adopted in high jewellery since the collection's introduction. Whether this represents direct influence or parallel response to shared market conditions is a question that the history of design rarely resolves cleanly.

What is clear is that Sugar, alongside de Grisogono's black-diamond work and its Allegra and Boule collections, established the house as a genuinely distinctive voice in late-twentieth and early-twenty-first century high jewellery — one that took coloured gemstones seriously as primary materials rather than as decorative supplements to a diamond-centred hierarchy. For gemmologists and jewellery historians, the Sugar collection represents a useful case study in how chromatic and material choices at the design stage translate into specific gemmological requirements at the sourcing stage: the need for consistent colour in small calibrated pink sapphires, for tsavorites of sufficient saturation to hold their own in dense cluster settings, and for amethysts of deep enough colour to avoid appearing washed out against a black metal ground.

De Grisogono faced significant financial difficulties in the late 2010s, and the house's future ownership and operational status have been subject to change. The Sugar collection, however, remains part of the documented record of Geneva high jewellery, and existing pieces continue to circulate in the secondary market and in auction catalogues as representative examples of the house's work at its most characteristic.

Further Reading

• Gems & Gemology — GIA's peer-reviewed quarterly (gia.edu)
• GIA Colored Stone Research (gia.edu)