Butterfly by Stacy Alexander, originally uploaded by John and Stacy.

Glass mosaic butterfly by Mosaic Artist – Stacy Alexander – 2006

Mosaic Dragonfly Box, originally uploaded by John and Stacy.

Vitreous Glass tile on wooden box
Stacy Alexander, mosaic artist

Mosaic Art Source mosaic definition:

Mosaic definition vitreous tile m.a.s. vitreous tile

vitreous tile – square glass mosaic tiles most commonly 3/4″ x 3/4″ made in molds from glass paste. They have a smooth top but the bottom is keyed with ridges for better adhesion. m.a.s.mosaic glossary