| quartzite |
 Quartzite is a compact granular rock composed of quartz crystals, usually so firmly cemented as to make the mass homogeneous. The stone is generally quarried in stratified layers, the surfaces of which are unusually smooth, and therefore the crushing and tensile strength are extremely high. The color range is wide. In some deposits, because of the intrusion of minerals during the formation process, unusual shades of brown and gold are found. |
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| autumn gold | birch creek | ||||
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| carderock™ | chocolate charcoal | ||||
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| silver | |||||
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| south bay | white | ||||
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| Fossil Green Slate | Virgina Ledge | ||||