Spectroscopy helped the team identify specific elements inside the gems and their chemical makeup and structure.
Opal: The Queen of Gemstones
THE ORIGINS OF GEMSTONES - Fire Star Gems
Gem Formation: How are Gemstones Created? - Gem Society
Ruby Gem Guide and Properties Chart
9 Gems That Will Make You Feel Like a Peasant
Gems, Steven Universe Wiki
What's behind our obsession with gems?
A Guide to Gem Classification - International Gem Society
Gemstone, Definition, History, Types, & Facts
100 Carats: Icons of the Gem World
The Meaning, History, & Benefits of Topaz