The best replacement for zirconia is diamond.

The best alternatives to zirconia are rated as following:
★★★★★  diamond
★★★★★  moissanite
★★★★  zirconium
★★★  emax
★★★  diamonds
★★★  pfm
★★  real diamond
★★  alumina
★★  porcelain crown
★★  swarovski
★★  real diamonds
★  pfm crown
★  gold crowns
★  aluminum oxide
★  porcelain crowns
★  swarovski crystal
★  diamonique
★  titania
★  crystal
★  ceramic crowns
★  swarovski crystals
★  metal crown
★  cubic zirconia
★  gold crown
★  zircon
★  diamond which is better
★  diamond difference
★  emax crowns
  diamonart
  lab created diamonds
  diamond how to tell
  lab created diamond
  white topaz
  white sapphire
  crystals
  lithium disilicate
  rhinestone
  russian brilliants
  synthetic diamonds

Your alternative for zirconia is not listed? Suggest!
Speaking about zirconia, one probably shouldn't forget about white gold.

Other search terms related to zirconia and their ratings are:
★★★★★ white gold
★★★ real gold
★★ platinum
★★ sterling silver
★★ white gold rings
★ white gold earrings
★ gold band
★ sterling silver rings
★ 14k gold
★ gold setting
gold rings
platinum band
porcelain crowns
silver rings
You have in mind a companion for zirconia and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of zirconia in all years. Click on graph for more.
zirconia
diamond
moissanite