Green Natural Stone Slabs

No — and this is one of the most important distinctions in the stone industry. Many commercial 'green marbles' are actually serpentinites. Serpentinite is a metamorphic rock formed from the alteration of peridotite (a rock from the earth's mantle) by hot water — a process called serpentinisation. It is composed of serpentine minerals, not calcite. This matters practically: serpentinite does not react to acids the way calcite marble does, but it can be sensitive to moisture-related expansion and may contain veins of softer minerals like talc. Verde Guatemala (from Guatemala and India), Verde Alpi (from Italy), and many other green stones are serpentinites. True green calcite marble — where the green colour comes from chlorite inclusions in a calcite matrix — is rarer. We specify the geological identity of every green stone we sell.

It depends on the specific stone. Green quartzite (like Emerald Green or Fusion Green) is excellent for kitchens — Mohs 7, acid-resistant, very hard-wearing. Green serpentinite (like Verde Guatemala) is moderately hard and does not etch from acids, but it can be vulnerable to thermal shock and may develop hairline cracks over time if exposed to extreme temperature changes — placing a very hot pan directly on the surface is not recommended. Green calcite marble behaves like any marble — needs sealing, reacts to acids, suits kitchens with attentive care. Green onyx is too soft and delicate for kitchen worktops. For a green kitchen worktop with minimal maintenance concerns, green quartzite is the safest choice.

Green stones come from all over the world, reflecting the global distribution of the geological processes that create them. India's Rajasthan region produces several green serpentinites and quartzites, including Rainforest Green. Guatemala is the source of Verde Guatemala, one of the most widely used green serpentinites. Italy produces Verde Alpi from the Alpine ophiolite belt and Verde Issoire from Liguria. Brazil is the primary source of green quartzites like Emerald Green and exotic varieties like Amazzonite. Iran produces green onyx from cave and spring deposits. Pakistan produces Green Onyx from Balochistan. The geological processes that create green stone — serpentinisation, chlorite formation, copper deposition — occur at tectonic plate boundaries worldwide, which is why green stones exist on every continent.

Care depends on the specific stone type. Green calcite marble needs the same care as white marble: impregnating sealer every 12–18 months, pH-neutral cleaners, prompt wipe-up of acidic spills. Green serpentinite has different needs — it does not react to acids, but it is sensitive to moisture and temperature extremes. Seal serpentinite with a breathable impregnator, avoid prolonged water exposure (wipe wet surfaces dry), and never place very hot objects directly on the surface. Green quartzite is the lowest-maintenance option: seal annually, and it resists acids, scratching, and staining with minimal effort. Green onyx should be treated as a delicate decorative material — seal frequently, avoid all chemical contact, and use only for low-traffic decorative applications.