Square decorative concrete tile with geometric cutouts, beige with lighter accents, on a black background.
A pile of small, uneven pieces of black charcoal or similar material on a transparent background.
A square ceramic tile with geometric textured design in shades of green and blue, featuring diagonal lines, triangles, and horizontal lines.
A mound of beige, granular substance on a light blue background.

Cast Carbon is a wall tile that imparts earthy elegance to any space. Made from plant- and mineral-based ingredients, it not only beautifies interiors but can ultimately be returned to nature as a nutrient-rich, restorative soil conditioner.

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Eight lines radiating from a central point, creating a star-like pattern.

beautiful AND ethical

Three black hexagons outlined in brown on a black background.

biodegradable YET durable

Icon of a flame within a shield.

fireproof WITHOUT flame retardants

A black arrow pointing downward with a sharp arrowhead on a black background.

carbon negative by nature NOT offsets

Three black outlined star shapes on a white background.

enhancE your LEED points with EASE

Cast Carbon is beautification, nature regeneration and soil restoration in a square. We’re your Cradle-to-Compost specification.

Flowchart illustrating project timeline from 2025 to 2027, with three stages: 2025 final ASTM tests, 2026 label declaration and production, and 2027 scaled production with new form factors.
Outline map of New York with text 'New York State of Opportunity' on the left and 'NYSERDA' on the right, separated by a vertical line.
JLL Foundation logo with a black and white design featuring a stylized globe and text.
Graphic with a raised fist holding a hammer, and text stating "Builders for Climate Action".
Text overlay reading 'The Trust for Governor's Island' on a black background
Columbia Technology Ventures logo featuring a crown graphic above the text.
Logo with a gear-like design including a world map in the center, and text reading 'The International Science Foundation Foundation' arranged around the gear.
Black logo featuring a circular design with stylized leaf and plant motifs and the text 'BEMC' beside it.
IMPEL INNOVATOR logo with stylized text and a dark background.
Logo of ABC Advanced Building Controls, featuring a stylized 'ABC' with a building silhouette in the background and the company name below.
A person's hand pressing into a pile of dry straw or hay.

Designers, we’re here to help you create spaces that are good for your client and the earth.

Since people spend 90% of their lives indoors, they now expect spaces that support beauty, performance, health and ethics—especially through a deeper connection to nature. With proven benefits like healing, stress relief, and talent retention, biophilic design is no longer a trend but the standard. Designers shouldn’t have to be toxicologists to meet it—let’s make it easy to create clean, beautiful interiors where people and nature thrive.

  • Provide your clients a differentiated, high-nature experience that everyone can feel good about.

  • Biogenic Carbon Storage + Carbon Negativity, Circularity, Material Health: all in one tile.

  • Let your walls tell your sustainability story and help you retain top talent through high-nature, resimercial finishes.

  • Leverage your next renovation cycle and nature to preserve asset value and compete with best-in-class buildings.

  • Help urban renewal also revitalize rural economies while meeting your strategic procurement, embodied carbon + zero waste goals.

A flowchart outlining the process of creating sustainable tiles from gathering raw materials, crafting the tiles, installing them, reusing them, and returning to the earth. It includes numbered steps and brief descriptions of each phase, emphasizing environmentally friendly practices.

Helping the Next Generation

A Little Bit About Us

Cast Carbon is created by PHYTOSTONE LLC, a woman-owned atelier focused on advanced natural materiality. Our team spans Western NY, Brooklyn, Virginia and Mexico.

Cast Carbon development is the result of grit and a love for the natural and human worlds we inhabit.