Basic Guidelines For English Spellings
1A diamond or other crystal that is twinned.‘Almost all the creeks that have produced gold crystals have produced triangular spinel-twinned crystals or macles.’
- ‘Flattened contact twins are known in the gem trade as macles.’
- ‘Good brown macle twins up to several carats in weight have been available in recent years from the Udachnaya mine.’
2another term for chiastolite‘The chiastolite, or macle, shows the representation of a cross on its surface, this effect being produced by the regular arrangement of carbonaceous impurities along the axes of the crystal.’
- ‘The variety chiastolite (also called cross-stone, or macle) forms long prisms in a cross section.’
Early 19th century from French, from Anglo-Latin mascula ‘mesh’.
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