Dolacite was a type of valuable mineral substance.
History and specifics[]
Deposits of dolacite (along with dilithium, duranium and berynium) were found on the planet Beta Cabrini IV, home to a Federation colony. As such, the minerals were the reason the colony was attacked by Merkaan raiders led by Hamesaad Dreen in the year 2268. (TOS novel: Legacy)
Dolacite was one of Imprima's exports. (TNG novel: Fortune's Light)
Dolacite was used to line the insides of warp nacelles. It was also capable of circumventing a starship's internal sensors. In 2367, Idun Asmund hid among dolacite containers in the USS Enterprise-D's cargo bay. (TNG novel: Reunion)