Basal cleavage

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Related to Basal cleavage: Prismatic cleavage, pinacoidal cleavage
See under Cleavage.
cleavage parallel to the base of a crystal, or to the plane of the lateral axes.

See also: Basal, Cleavage

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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References in periodicals archive ?
Although highly resistant to grinding and cutting, beryl does have a weakly developed basal cleavage. Ancient stonecutters could thus cleave it perpendicular to the crystal axis to produce hexagonal prisms of any desired length.
Scanning electron microscopy revealed the pseudo-hexagonal platy shape of the crystals but an absence of basal cleavage (Fig.