Ancient Ritual Tomes are used in the creating of Celestine Ward Armor. You cannot distinguish them by name as they're all called Ancient Ritual Rune. Instead you can distinguish them by their description and the 6 different icons.
Depending on the requirements of the armor piece you want to create, different candles, runes and tomes are combined together at the Ancient Ritual Stone.
They can be traded.
They come in three tiers.
Tier 1 Ancient Ritual Runes are:
Tier 2 Ancient Ritual Runes are:
Tier 3 Ancient Ritual Runes are: