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Webster 1913 Edition
Euclase
Eu′clase
Noun.
[Gr.
εὖ
well, easily + [GREEK] to break. Cf. F. euclase
, G. euklas
. See named from its brittleness.] (Min.)
A brittle gem occurring in light green, transparent crystals, affording a brilliant clinodiagonal cleavage. It is a silicate of alumina and glucina.
Webster 1828 Edition
Euclase
EU'CLASE
,Noun.
A mineral, a species of emerald, prismatic emerald, of a greenish white, apple or mountain green, bluish green, or dark sky blue color. It is a rare mineral, and remarkably brittle, whence its name.