Marble
Rock type
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Marble is a metamorphic rock consisting of carbonate minerals that have recrystallized under the influence of heat and pressure. It has a crystalline texture, and is typically not foliated, although there are exceptions. Wikipedia
Hardness: hard
Colour: White, Pink, Black etc
Grain size: medium grained
Mineralogy: calcite
Other features: generally gritty to touch
Texture: granular
Uses: building stone