sedimentary (man-made composite)

Terrazzo (with Marble and Granite fragments)

Cementitious or resinous composite containing Calcium Carbonate (CaCO3) and Silicates

Hardness: 3-7 Mohs (varies by clast); Color: Multicolored (black, grey, orange clasts); Luster: Polished/Dull; Structure: Clastic/Aggregate mix; Cleavage: None (composite material); Specific Gravity: 2.4 - 2.8

Hardness: 3-7 Mohs (varies by clast)
Color: Multicolored (black, grey, orange clasts)
Luster: Polished/Dull

Identified February 10, 2026More sedimentary (man-made composite) →

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Physical properties

Formation & geological history

Created by embedding rock chips (commonly marble, quartz, granite, or glass) into a binder of cement or epoxy resin, then ground and polished to a smooth surface. Originally developed in 15th-century Venice.

Uses & applications

Predominantly used as high-end flooring, wall treatments, countertops, and decorative architectural elements in commercial and residential buildings.

Geological facts

Terrazzo was a way for Venetian mosaic workers to use up discarded marble scraps. It is one of the world's first 'green' recycled building materials. The Hollywood Walk of Fame is made of terrazzo.

Field identification & locations

Identify in the field by the 'confetti' look of angular rock fragments suspended in a uniform matrix. Commonly found in mid-century modern architecture, schools, and government buildings.

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