MK26AM7: Very aerial group of sharp tetrahedral crystals of Helvine. From a classic Brazilian locality for the species.
We will ship the specimen in its original Perky box from the Robert J. (Bob) Noble collection, which also contains the label.
Navegadora claim (Orozimbo claim), Penha do Norte, Conselheiro Pena, Vale do Rio Doce, Minas Gerais  Brazil

Specimen size: 2.5 × 1.7 × 0.9 cm = 0.98” × 0.67” × 0.35”

Main crystal size: 0.8 × 0.7 cm = 0.31” × 0.28”