The best replacement for rubies is diamonds.

The best alternatives to rubies are rated as following:
★★★★★  diamonds
★★★★  emeralds
★★★★  garnets
★★  natural rubies
★★  sapphires
★  real rubies
  rubies
  lab created

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

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



Google Trends

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