The Collaborative International Dictionary of English v.0.48:

Reflet \Re*flet"\ (re*fl[e^]"), n. [F., reflection. See
   Reflect.]
   Luster; special brilliancy of surface; -- used esp. in
   ceramics to denote the peculiar metallic brilliancy seen in
   lustered pottery such as majolica; as, silver reflet; gold
   reflet.
   [Webster 1913 Suppl.]