macle

noun

Chiastolite.

noun

A twinned crystal.

noun

A dark spot or discoloration in a mineral.

noun

Same as mackle.

noun

In mineralogy

noun

A kind of twin crystal. See twin.

noun

Chiastolite, cross-stone, or hollow spar, a variety of andalusite, the crystals of which have the axis and angles colored differently from the remainder. See chiastolite.

noun

A tessellated appearance in other crystals.

noun

In heraldry, same as muscle, 3.

noun

Chiastolite; — so called from the tessellated appearance of a cross section. See chiastolite.