Glass fusion melts several layers of glass together when fired in a kiln. One of the glasses you can use for example is dichroic glass which has very shiny metallic colors and is a recent innovation. 

Dragon fly pendant $26.00	Wrapped blue and gold green dichroic pendant on silver chain $25.00	Gold and blue dichroic pendant on sterling silver chain $34.00	Wired clear -flowers dichroic pendant $24.50
glass fusion pendant $15.00	Wire, blue and pink dichroic square pendant $22.50	Dragonfly pendant $20.00	Clear dichroic pendant $32.00
Glass Cross Pendant $15.00	Millefiori and squares $18.00	Glass fusion pendant $18.00	Silver and black pendant $20.00
Smiling face $20.00	dichroic pendant $20.00	dichroic circle pendant $28.00	Butterfly dichroic pendant $22.00
Kidney shaped dichroic pendant on a blue cord $30.00	Dichroic blue squares pendant $20.00	Rectangular pendant $22.00	Cone-shaped dichroic pendant $24.00
Clear square dichroic pendant $20.00	Small dichroic pendant $15.00	Dragonfly earrings $19.00	Gold dichroic earrings $18.00
Fish earrings $9.50	Joy and truth earrings $9.50	Dichroic heart wrapped in sterling silver $25.00	Clear wire and fish pendant $17.50
Dichroic earrings $15.00	Pink and gold circle earrings $13.00	Dichroic pendant $20.00	Dichroic pendant wrapped in wire $25.00
Blue glass wrapped in wire pendant $30.00	Wire wrapped blue and orange curve dichroic pendant $25.00	Checkered dichroic pendant on sterling silver necklace $28.00	Dichroic pendant $21.00
Dichroic pendant $19.00	Dichroic pendant $20.75	Dichroic pendant $18.00	Dichroic pendant $19.00
Dichroic pendant $19.00	Dichroic pendant $18.00	Dichroic pendant $19.75	Dichroic pendant $20.00
Dichroic pendant $22.00	Dichroic pendant $28.00	Dichroic pendant $19.00	Dichroic pendant $22.00
Dichroic pendant $13.00	Dichroic pendant $21.00	Dichroic pendant $19.00	Dichroic pendant $23.00