Vocabulary
COURSE - a row of stones.
ASHLAR - cut, rectangular stone used in walls.
RUBBLE - irregular, uncut stone used in walls.
Random Rubble
This pattern is made from stones of different shapes and sizes without much order. The pieces fit together fairly well.
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Coursed Rubble
This pattern is made from uncut stones placed in rows called courses.
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Mosaic
Like the mosaics of ancient Rome, this is a pattern of different stones that fit together very well.
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Random Ashlar
This pattern is made of cut stones that fit together, but are not in rows.
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Coursed Ashlar
This is a pattern of cut stones that fit together and are placed in rows.
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