intrusive
Granite
Granite is a coarse-grained intrusive igneous rock mainly composed of quartz, feldspar, and mica. It is widely used in construction and design.
Hardness 6–7India
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metamorphic
Marble
Marble is a metamorphic rock formed from limestone, renowned for its beauty and versatility in art and architecture.
Hardness 3–4Italy
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
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