Rossmanite was found in a lepidolite subtype pegmatite dike at Dobra Voda. It occurs with other members of the tourmaline group (schorl and elbaite). Based on paragenesis and textural relations, elbaite-rossmanite is the last tourmaline to crystallize at Dobra Voda.
Composition:
References:
Selway JB, Novák M, Cerný P, Hawthorne FC
(1999) Compositional evolution of tourmaline in lepidolite-subtype pegmatites.
European Journal of Mineralogy, 11:569-584.