Cardinal gems are gemstones which have traditionally been considered precious above all others. The classification of the cardinal gems dates back to antiquity, and was largely determined by ceremonial or religious use as well as rarity.[1] The term has largely fallen out of use.
The five traditional cardinal gems are:
- amethyst (purple) – Rare and precious in the Old World until large deposits were found in Brazil.
- diamond (transparent)
- emerald (green)
- ruby (red)
- sapphire (blue)
- ^ Geary, T.F.; Whalen, D. (2008). The Illustrated Bead Bible: Terms, Tips & Techniques. Sterling. p. 69. ISBN 978-1-4027-2353-7. Archived from the original on 16 January 2021. Retrieved 19 July 2015.