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Granite is a very hard, granular, crystalline igneous rock which consists mainly of quartz, mica, and feldspar and is often used as building stone
From Italian granito, which means grained rock, from grano grain, and from Latin granum
Coarse Grained Rock, Opaque Rock
Oolite is a sedimentary rock formed from ooids, spherical grains which are composed of concentric layers of calcite
From oo- + -lite, after German Oolit. A rock consisting of fine grains of carbonate of lime
Durable Rock, Medium Hardness Rock
Fine Grained Rock, Opaque Rock