sienna murdoch is a london based artist working with geline, a biomaterial she developed from algae.

Geline sits somewhere between jelly, silicone, and glass — soft yet resilient, fleshy, seductive, strange. It melts and reforms endlessly, each incarnation carrying traces of what it has been.

All moulds are handmade, cast from sculpted forms that mimic tools, toys, body parts, food, and redundant apparatus; pigments are sourced from scrapings, food waste, and expired cosmetics. It is a lifelong lens — a biomaterial taken as far as possible from utility into otherworldly expression.​​​​​​​​​​​​​​​​

Alongside her personal practise, geline operates across contexts. as backdrops and filters for photography, it acts like a second skin. as props for film and performance it can be repurposed when production wraps. as a workshop material it opens up tactile, embodied making for children and neurodivergent participants. for collaborators it has been used to prototype tech, jewellery, confectionery, and toys before committing to permanent form.

current projects include translating precious marbles and gemstones into biomaterial iterations, large-scale geline reliefs, geline wearables, moulds for chocolatiers and a long-term residential installation opening in late 2026 - a geline-covered space sienna will inhabit while welcoming visitors over an extended period.

sienna collaborates widely, creating bespoke shapes, collections, installations and sculptural environments for fashion houses, cultural institutions, film productions, and public events.