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Marble is a non-foliated metamorphic rock which is composed of recrystallized carbonate which is formed when limestone is exposed to high temperatures and pressures over a long time
From the Greek marmaros, shining stone and also from the English word marmoreal meaning marble-like
Durable Rock, Medium Hardness Rock
Medium Grained Rock, Opaque Rock
Kimberlite is a rare, blue-tinged, coarse-grained intrusive igneous rock, which sometimes contains diamonds and is mostly found in South Africa and Siberia.
From Kimberley + -ite, from the name of the South African town of Kimberley where the rock was first found.
Coarse Grained Rock, Fine Grained Rock, Opaque Rock