CINNABAR
HgS
Duyun, Guizhou Province, China

This is an unusually large and fine interpenetrant twin of cinnabar. The two crystals of the twin join along irregular internal boundaries between their atomic structures. The twin relationship initiated at the very beginning of the growth of the crystals.

Size: 3.2 cm high

Acquired: 1991 purchase, Chromy Fund.

Disposition: On display in the Systematic Mineralogy exhibit.

Catalog Number: 36134