Barite

Barite from Barytovyi pass, Arkhyz, Bolshoi Kavkav.
[photo/collection: Maurice de Graaf

Barite with tiny pyrites from Belorechensk
[photo/collection: Viktor Slyotov]

Massive Barite from the Elbrusskiy mine with some yellow orpiment.
[photo/collection Maurice de Graaf]

White sprays are probably Barite or Messelite. The yellow crystals are Anapaite. Zheleznyi Rog, Taman peninsula.
[photo/collection: Maurice de Graaf]