An excellent and showy Pribram reference specimen from the collection of the well-known Pribram specialist, Josef Vajdak. A 1 mm, gemmy, light red pyrostilpnite crystal, a rare sulfosalt, is nestled in a vug with lustrous, dark cherry-red, micro proustite crystals in a native arsenic matrix. The paper arrow shows the way to the vug. Ex. Petr Ondrus and Josef Vajdak Collections.