The Collaborative International Dictionary of English v.0.48:

Florentine \Flor"en*tine\ (? or ?; 277), a. [L. Florentinus, fr.
   Florentia Florence: cf. F. florentin.]
   Belonging or relating to Florence, in Italy.
   [1913 Webster]

   Florentine mosaic, a mosaic of hard or semiprecious stones,
      often so chosen and arranged that their natural colors
      represent leaves, flowers, and the like, inlaid in a
      background, usually of black or white marble.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mosaic \Mo*sa"ic\, a.
   Of or pertaining to the style of work called mosaic; formed
   by uniting pieces of different colors; variegated;
   tessellated; also, composed of various materials or
   ingredients.
   [1913 Webster]

         A very beautiful mosaic pavement.        --Addison.
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   Florentine mosaic. See under Florentine.

   Mosaic gold.
   (a) See Ormolu.
   (b) Stannic sulphide, SnS2, obtained as a yellow scaly
       crystalline powder, and used as a pigment in bronzing and
       gilding wood and metal work. It was called by the
       alchemists aurum musivum, or aurum mosaicum. Called
       also bronze powder.

   Mosaic work. See Mosaic, n.
      [1913 Webster]