How a commission works.

Browse the collection, sit with a specimen in the viewer, then begin an inquiry. We respond within two business days to understand the brief, quote privately, and prepare a staged render before anything is cast.

Every piece is made to order, at a scale and finish chosen with you, so each is priced privately on inquiry.

Lead time depends on the scale and finish of the piece. We confirm a timeline with your private quote and keep you updated through moulding, casting, finishing, and installation.

Yes — note it in your inquiry. Where a licensed original mould exists, we can often produce it.

A hand-finished resin and fibreglass composite, internally reinforced for permanence and safe mounting at scale, then hand-patinated and sealed.

No. Every OSSA piece is a cast — a faithful reproduction. We never sell, trade, or deal in real fossils or excavated material.

A cast asks little: dust gently with a soft, dry cloth, keep it out of direct sunlight and away from damp, and avoid solvents. Full care notes accompany every delivery.

Yes — hand-patinated to the tone you choose: pale bone, fossil-dark, or a bespoke finish matched to the room.

Yes — worldwide. We crate, ship, install (floor-standing, plinth, vitrine, or suspended), and specify and place the lighting so the cast reads as it should.

Weight and mounting vary with the piece — from a few kilograms for a tooth to substantial loads for a full skeleton. We survey the space and structure before casting and engineer the mount for floor, wall, or suspension.

Always. We work directly with trade on commissions.

Each commission is staged. Deposit and milestone terms are set out in your private quote and commission agreement, and confirmed in writing before work begins.

Every piece is made to order, so cancellation terms reflect the stage of production. The specifics are set out in your commission agreement.