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Webster 1913 Edition

Hornstone

Horn′stoneˊ

,
Noun.
(Min.)
A siliceous stone, a variety of quartz, closely resembling flint, but more brittle; – called also
chert
.

Webster 1828 Edition

Hornstone

HORN'STONE

,
Noun.
A siliceous stone, a subspecies of quartz. It is divided by Jameson into splintery, conchoidal, and wood-stone. [See Chert.]

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