Lewis & Short

margărītārĭus, a, um, adj. [margarita],

  1. I. of or belonging to pearls, pearl- (postclass.): porticus, where pearls were bought, Auct. de Region. Urb. Rom. Reg. 8.
  2. II. Subst.
    1. A. margărītārĭus, ii, m., a dealer in pearls, a pearl-fisher, Firm. Math. 4, 6; Inscr. Orell. 1602; 4076; 4218.
    2. B. Margărītārĭa, ae, f., a female dealer in pearls, Inscr Orell. 4148.