The best replacement for crystals is rhinestones.

The best alternatives to crystals are rated as following:
★★★★★  rhinestones
★★★★★  diamonds
★★★  instant ocean
★★★  sugar crystals
★★★  gemstones
★★★  salt crystals
★★  cubic zirconia
★★  stones
★  powder
★  gems
★  white castle
★  rock candy
★  oscillators
★  hairs
★  truvia
★  coconut sugar
★  pellets
  negative energy
  clumping litter
  minerals
  orgone
  pearls

Your alternative for crystals is not listed? Suggest!
Speaking about crystals, one probably shouldn't forget about rainbows.

Other search terms related to crystals and their ratings are:
★★★★★ rainbows
reiki
You have in mind a companion for crystals and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of crystals in all years. Click on graph for more.
crystals
rhinestones
diamonds