Sarah & Sebastian debut OVERTONE with organic South Sea and keshi pearls

Sarah & Sebastian unveiled OVERTONE, a fine jewellery collection built around South Sea and keshi pearls, on 24.02.26. The collection draws its concept from the oyster’s internal ecosystem and foregrounds organic, asymmetrical forms, putting large South Sea pearls and irregularly shaped keshi at the center of each design.

OVERTONE’s pieces intentionally celebrate irregularity: the collection pairs visibly baroque South Sea pearls with smaller, non-nucleated keshi pearls to create layered, tactile compositions. The design language leans into the oyster-inspired internal topography, translating undulating surfaces and off-kilter silhouettes into settings that highlight each pearl’s unique luster and contour. Sarah & Sebastian’s choice to emphasize asymmetry signals a deliberate move away from matched-strand uniformity toward single-stone presence and sculptural contrasts.

The materials named for the launch are specific: South Sea pearls and keshi pearls drive the aesthetic and the technical decisions. Large South Sea pearls, prized for their size and satiny overtones, form focal points in the collection while keshi pearls contribute irregular texture and shine. By anchoring OVERTONE on these two pearl types, Sarah & Sebastian positions the collection within the fine-jewellery category where gem selection dictates both price and provenance narratives.

Presentation and timing were precise: the launch date of 24.02.26 marked the public debut of OVERTONE. That timing places the collection in the current moment where pearl design is revisiting organic forms; within that context, Sarah & Sebastian’s oyster-ecosystem inspiration and the explicit use of South Sea and keshi pearls set clear creative parameters for buyers and collectors assessing craftsmanship and material intent.

OVERTONE’s emphasis on asymmetry and large South Sea pearls will matter to collectors tracking material authenticity and form. The collection’s stated inspiration, the oyster’s internal ecosystem, and the specific pairing of South Sea and keshi pearls create a readable design thesis: value here accrues from singular pearl character and tactile composition rather than from conventional uniformity. Expect OVERTONE to steer conversations about how contemporary fine jewellery can foreground natural irregularity while making pearl provenance and selection the visible point of craft.