MD51AB9: Doubly terminated and large (for the locality) crystal, with growth lines and very well defined dissolution forms. Its blue color is more intense than usual in samples from Virgem da Lapa. It has small aggregates of leafy Muscovite crystals.
Virgem da Lapa, Jequitinhonha, Minas Gerais  Brazil (±1970)

Specimen size: 10.3 × 9.5 × 7.5 cm = 4.06” × 3.74” × 2.95”

Main crystal size: 8 × 7.3 cm = 3.15” × 2.87”