Archaeologically Related Rock and Stone

Limestone. Limestone usually occurs as a white or light-shaded sedimentary monomineral formed by the consolidation of calcite (composed of calcium carbonate) sediments. It is a soft rock that can easily be cut and shaped into any size and form, so it has been used, since early antiquity, for [Pg.55]

Andesite Making tools Complex metal silicates (about 60% silica) Compact and tough chips easily [Pg.56]

Basalt Building Complex metal silicates (about 50% silica) Dark-colored, fine-grained [Pg.56]

Diamond Precious-stone grinding and polishing Pure carbon High refractive index hardest material on earth [Pg.56]

Emerald Gemstone A variety of beryl Very hard [Pg.56]

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