Emily Dickinson Lexicon
Definition for ROCK-CRYS'TAL
ROCK-CRYS'TAL, n.
Limpid quartz. When purest it is white or colorless, but it is found of a grayish or yellowish white, pale yellow or citrine. Its most usual form is that of hexagonal prisms, surmounted by hexagonal pyramids. – Kirwan. Cleaveland.
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