Biomarble
Urchinite™ is a biomarble mineralized from sea urchin shells, designed to support marine restoration and architectural design. It is crafted from biocalcites, a naturally occurring marine mineral found in purple sea urchin shells. Designed to be more durable and exceed the performance of natural marble and limestone, Urchinite biomarble is ideal for interior and architectural applications such as countertops, wall coverings, flooring, furniture, and decor. For architects and designers, it offers a material rich in texture, origin, and story — a surface you can trace back to a marine restoration event, one that is about beauty, but also about repair. And for homeowners and builders, Urchinite is a chance to incorporate rare, regenerative materials into bespoke environments that impart enduring value and oceanic beauty.
Pre-Order Urchinite. Be First.
Own a piece of design and marine history. Urchinite is the world’s first marble made from purple sea urchins, a breakthrough in sustainable material innovation. Our debut collection includes Uni Plinth Side Table — a meticulously crafted piece priced between $1,200 and $3,000 depending on size, color, and impact.
Each item is crafted to order, with seasonal production runs and a 12–18 week lead time starting in Summer 2026. Furniture pieces will be custom-quoted once final designs are selected. Pre-order now to reserve your piece. Your reservation is fully refundable, and will be applied toward your future full orders.
Quantities are limited.
Pre-Order Urchinite. Be First.
Own a piece of design and marine history. Urchinite is the world’s first marble made from purple sea urchins, a breakthrough in sustainable material innovation. Our debut collection includes Tidalith Urchinite Marble Dining Table — an intricate and high performance piece priced between $3,200 and $9,900 depending on size, color, and impact.
Each item is crafted to order, with seasonal production runs and a 12–18 week lead time beginning Summer 2025. Furniture pieces will be custom-quoted once final designs are selected. Pre-order now to reserve your piece. Your reservation is fully refundable, and will be applied toward your future full orders.
Quantities are limited.
Pre-Order Urchinite. Be First.
Own a piece of design and marine history. Urchinite is the world’s first marble made from purple sea urchins, a breakthrough in sustainable material innovation. Our debut collection includes Uni Abalone Vessels - sculptural decor pieces priced between $300 and $1,200 depending on size, form, and finish.
Each item is crafted to order, with seasonal production runs and a 12–18 week lead time beginning Summer 2026. Decor pieces will be custom-quoted once final designs are selected. Pre-order now to reserve your piece. Your reservation is fully refundable, and will be applied toward your future full orders.
Quantities are limited.
ORDER SAMPLES Urchinite is a seasonal, regenerative material. Sample boxes will contain the current season's latest colors, patterns, and finishes. Each box includes a seasonal selection of Urchinite biomarble samples in 4” x 4” inches. When you are ready to place a full order, the sample costs will be deducted from your final purchase.
Choosing Urchinite biomarble means contributing to active kelp restoration projects. For every slab of 5’ x 8’ urchinite, 1,000 square foot of purple sea urchins are cleared for kelp restoration, enabling kelp forests to regrow and biodiversity to rebound. Production runs are seasonal and limited. Each sample box is made to order, so please allow 12-18 weeks for fulfillment.
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Urchinite™ is a biomarble engineered from sea urchin shells, designed to support marine restoration and architectural design. Made from biocalcite, a naturally occurring marine mineral found in sea urchin shells, Urchinite is formed by integrating this mineral into a biobased binder, resulting in a durable, marble-like stone material.
The sea urchins used are strongylocentrotus purpuratus, also known as purple sea urchins, which are harvested from targeted restoration sites where kelp forests have been severely damaged by them. By harvesting sea urchins from these impacted areas, Urchinite actively contributes to the recovery of marine ecosystems. As the world’s first biomarble made from marine biocalcite, Urchinite offers a regenerative material solution for natural green building and sustainable architecture.
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For every 50 units of biomarble slab, 1.1 acres of sea urchin are cleared to make way for kelp regrowth, transforming sea urchin deserts into vibrant kelp forest ecosystems. Each biomarble slab is 5’ x 8’ feet.
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Experienced, commercial scuba divers harvest purple sea urchins from the ocean at kelp restoration sites where sea urchin outbreaks have been particularly detrimental. Once landed, sea urchin biocalcites are mineralized and cultured with a biobased binder material, resulting in a durable, marble-like stone material called biomarble. The urchinite biomarble then undergoes finishing, grading, and stringent testing by our team of scientists and engineers to ensure their quality and performance are up to our standards. Each piece is hand crafted, and unique so no two are exactly the same.
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Biomarble is designed to be more durable than natural marble and limestone, with properties like temperature, stain, and chemical resistance.