The best replacement for amethyst is topaz.

The best alternatives to amethyst are rated as following:
★★★★★  topaz
★★★★★  garnet
★★★★  tanzanite
★★★  citrine
★★★  alexandrite
★★  lybrel
★★  aquamarine
★★  queen ashe
★  jasper
★  aurora skye
★  green quartz
★  tourmaline
★  blue sapphire
★  onyx
★  prasiolite
  woad ashe
  purple amethyst
  fluorite
  amethyst
  rose quartz

Your alternative for amethyst is not listed? Suggest!
Speaking about amethyst, one probably shouldn't forget about diamond ring.

Other search terms related to amethyst and their ratings are:
★★★★★ diamond ring
★★★★ calcite
★★★ rose quartz
★★★ citrine
diamonds ring
chocolate diamonds
You have in mind a companion for amethyst and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of amethyst in all years. Click on graph for more.
amethyst
topaz
garnet