Shells in Terrazo

There are an estimated 120,000 species of shells worldwide. Each shell varies greatly in appearance. Imagine yourself walking along the beach at sunrise. You’ll notice an abundance of shells present along the shore.

Many of us enjoy collecting seashells, but they serve a greater purpose to use daily. There are many applications for shells today. In ancient times they served as currency and were used for jewelry and ornaments. Today they are useful for water purification, organic fertilizer, and use as a construction material in pavements and terrazzo floors.

What Makes Shell a Unique Terrazzo Aggregate?

Shells produce iridescence through light scattering and refraction, and wavelengths reflect toward the viewer at different angles, creating a shimmer that shifts with lighting conditions. This iridescence is inherent to the material.

Epoxy terrazzo leads to a greater selection of aggregates for terrazzo designs. Shell aggregate is compatible with epoxy terrazzo systems, the current industry standard. Epoxy’s thin-set profile (3/8″ or 1/4″) makes shells a flexible design option for applications such as floors, precast stairs, wall panels, and countertops.

Why architects are specifying terrazzo with shells:

• Supports biophilic design goals by introducing an authentic organic material into the built environment.
• Durable, low-maintenance, and seamless ground and polished like marble or glass
• Iridescent features that provide great detail to the terrazzo floor.

Surfaces are no longer passive backdrops. They are active elements that shape the atmosphere, acoustics, and identity of the building. Designers are turning to solutions that balance artistry with specification strength. Terrazzo with shell designs delivers exactly that.

Mother of Pearl shines when used with terrazzo

Mother of Pearl Options for Terrazzo

Concord Terrazzo Company offers two primary types of Mother of Pearl options for customers: Freshwater Mother of Pearl and Classic Mother of Pearl. We also can supply specialty shells for project-specific applications.

Both aggregates provide an iridescent effect when used for terrazzo flooring. From a pricing perspective, Mother of Pearl aggregates are on par with costs for glass chips. For those looking for a budget-friendly material, Freshwater Mother of Pearl costs slightly less than Classic Mother of Pearl.

Freshwater vs Classic Mother of Pearl: At a Glance

Freshwater Mother of Pearl

Among TERRAZZCO Brand aggregates, Freshwater Mother of Pearl is a favorite among designers. Its name is derived from freshwater habitats which include lakes, reservoirs, rivers, ponds, and wetlands. Of all the water on Earth, 3% is fresh water.

When you compare Freshwater Mother of Pearl to Classic Mother of Pearl, you may notice some slight differences in color, shape, and texture. Pink and white hues are more present in this aggregate. It is also more smooth and rounder in appearance.

Check out some custom terrazzo samples that include Freshwater Mother of Pearl:

Check out some custom terrazzo samples that include Classic Mother of Pearl:

Shells offer unique terrazzo designs

While Mother of Pearl is widely used in modern terrazzo floors today, there are other shell options available that can alter a terrazzo’s design.

For terrazzo projects near beachside locations, designers may consider using shells that are locally sourced. These shells are then crushed and supplied for flooring contractors to install. Each shell can create a different look.

Take a look at some of the shells we’ve carried through the years.

What Architects are Saying About Shells & Biophilic Materials?

Architects and designers are prioritizing natural materials, organic forms, and healthier spaces that connect people with nature both aesthetically and emotionally. Sustainability and biophilia are increasingly intertwined, with designers selecting materials that not only look natural but also protect the natural world.

Shell terrazzo sits at the intersection of these priorities. It introduces a biophilic material of coastal and natural origins, used as part of a durable, commercial-grade flooring system. Aggregate selection alone produces a color palette wide enough to satisfy virtually any design intent, from neutral and monolithic to high-contrast custom patterns. Mother of Pearl extends that palette into territory no other aggregate occupies. Mother of Pearl is widely recognized in terrazzo designs today and appears in many architectural specifications.

Adding Shells to Your Terrazzo Design?

1. Select which shells you prefer, Freshwater or Classic MOP
2. Select chip sizing: choose #1 for refined dense aggregate coverage; #2 for bolder and more visible chips
3. Use sparingly in your overall mix design. A small amount is enough to add iridescence.
4. Select epoxy base color: Dark-based amplifies the golden/green tones of Classic MOP; light-based lets iridescence lead
5. Request samples: show off your design to your clients. TERRAZZCO offers free samples to the architectural and design community.

There are many different types of aggregates you can include in a terrazzo design. If you are thinking of adding shells in your terrazzo design, the TERRAZZCO team can collaborate with you in creating custom terrazzo samples. Contact a Concord Terrazzo Company representative today at info@terrazzco.com.