macle

(redirected from macles)
Also found in: Dictionary.

macle

[′mak·əl]
(crystallography)
A twinned crystal.
(lapidary)
A twin structure in a diamond.
(mineralogy)
A dark or discolored spot in a mineral specimen.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
Mentioned in ?
References in periodicals archive ?
They are already in my debt for a considerable sum, which they cannot pay back." This letter quoted the new price of "at least 600 livres," which breaks down to 578 simples at 16 sous, 11 macles at 31 sous and 15 decrements at 162 sous.
Rob Lavinsky of The Arkenstone is now beginning to import some colorless, flat-triangular spinel-twinned diamonds ("macles") which range from 5 to 13 carats weight and a few millimeters to more than 1 cm on edge, and these are lustrous and perfectly, beautifully gemmy.