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CATEGORY: ceramics
DEFINITION: A type of surface treatment of pottery frequently mistaken for glazing. It involves the application of a slip to the surface, but the slip is made of very fine clay containing an unusually high proportion of the mineral illite, which results in a glossier, shinier surface than normal slip after firing.
CATEGORY: artifact
DEFINITION: Flint with high surface sheen, usually denoting quality
sickle gloss
CATEGORY: artifact
DEFINITION: The gloss which occurs on the edge of flint sickle blades, and which is caused by the wear of the blade against the phytoliths in the grasses being reaped. A distinctive shine produced on flint tools which have been used to reap cereal grasses. The polish comes from the abrasive action of silica present in the stems of both wild and cultivated cereals, so the occurrence of reaping tools with sickle gloss need not by itself imply agriculture.
silica gloss
CATEGORY: artifact
DEFINITION: The sheen or polish that occurs on flint when it is used to cut grass

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