oq-gem

Glossary for gem taxonomy

Tiles of slate, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash. These tiles are usually thin and dark grey in colour. Overlapping and usually fastened to wood battens.

RMT4_Canada_OjdrovicN_1

Slate roof tiles, Canada (Ojdrovic Engineering)

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