What is the difference between onyx slab and marble slab for countertops?

Key differences: (1) Translucency - onyx is translucent (stunning backlit), marble is opaque; (2) Hardness - marble 3-4 Mohs vs onyx 2.5-3 (onyx softer); (3) Porosity - onyx more porous, needs frequent sealing; (4) Veining - onyx has banded patterns, marble veined; (5) Price - onyx more expensive. PFM recommends onyx for accent walls and bars, not daily-use countertops.

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As a leading natural stone supplier with 15+ years of experience, PFM (PFM Stone) offers premium materials sourced directly from quarries worldwide, expert craftsmanship, and comprehensive project support from design to installation. Our team has completed 2,000+ projects globally.

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