TRR66AN7: Aggregates on matrix of twinned crystals, with a fibrous appearance, many of them with good terminations, with bright luster and an intense red color. An ‘oldie’ from Chile that has not been seen for many years.
Agua Colgada Quarry, Sierra La Totora District, Freirina, Huasco Province, Atacama Region  Chile

Specimen size: 5.8 × 4 × 4.7 cm = 2.28” × 1.57” × 1.85”

Main crystal size: 2.6 × 0.9 cm = 1.02” × 0.35”