metamorphic

Green-and-white terrazzo (likely serpentine/marble aggregate)

Composite decorative stone; probable serpentinite (Mg₃Si₂O₅(OH)₄) with white calcite marble fragments in cementitious matrix

AI-generated identification · may be incorrect

Dark green, black, and pale pink-white angular chips in a polished, glossy surface. Serpentinite is typically Mohs 3–5 with waxy luster; calcite is Mohs 3 and effervesces in dilute acid. This is a processed composite rather than a single natural rock.

Identified August 18, 2026More metamorphic →

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At a glance

Common name: Green-and-white terrazzo (likely serpentine/marble aggregate)
Scientific name: Composite decorative stone; probable serpentinite (Mg₃Si₂O₅(OH)₄) with white calcite marble fragments in cementitious matrix
Category: metamorphic
Identified: August 18, 2026
Method: Standard

AI Estimated Value

Approximately $10–$80 for small decorative samples; $50–$200 per square foot for premium installed or reclaimed architectural material.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Manufactured terrazzo made by embedding crushed geological aggregate in cement or resin, then grinding and polishing; the source serpentinite and marble formed through metamorphism, generally during ancient mountain-building events.

Uses & applications

Used for flooring, countertops, wall cladding, stairs, and decorative architectural panels; occasionally sold as architectural salvage or polished slabs.

Geological facts

The irregular chip distribution and uniform polished surface strongly indicate terrazzo, not a natural breccia. Green serpentinite may contain minor chrysotile asbestos, so avoid cutting or sanding unknown material.

Field identification & locations

Identify by its repeated flat polished surface, cement/resin matrix, and randomly distributed chips. A drop of dilute hydrochloric acid may fizz on exposed calcite, but test inconspicuously and avoid damaging the finish; common in architectural interiors worldwide.