metamorphic
Amphibolite
Amphibolite is a dense, dark metamorphic rock primarily composed of amphibole and plagioclase minerals.
India
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metamorphic
Gneiss
Gneiss is a banded metamorphic rock formed under high temperature and pressure, known for its distinctive alternating layers.
Hardness 6–7India
metamorphic
Marble
Marble is a metamorphic rock formed from limestone, renowned for its beauty and versatility in art and architecture.
Hardness 3–4Italy
metamorphic
Phyllite
Phyllite is a fine-grained metamorphic rock with a silky sheen, formed from slate. It bridges the gap between slate and schist in metamorphic grade.
Hardness 1.5–2.5India
metamorphic
Quartzite
Quartzite is a hard, non-foliated metamorphic rock formed from quartz-rich sandstone, prized for its durability and natural beauty.
Hardness 7India
metamorphic
Serpentinite
Serpentinite is a greenish metamorphic rock formed from ultramafic rocks, often with a slippery, waxy feel and mottled appearance.
Hardness 2.5–5India
metamorphic
Slate
Slate is a fine-grained metamorphic rock known for splitting into thin, durable sheets. It's widely used in roofing, flooring, and chalkboards.
Hardness 2.5–4Wales