Anyone that has defected from Live and doesn't play a cleric probably would have never have even thought of this. They removed the reagent from symbols and a host of other spells many years ago.
Perodots for Cleric Symbols
Emeralds for Cleric's Divine Intervention (is it even in game yet? heh)
Opals for Druid's Wake of Karana (turning off rain/snow)
I'm sure there are a few others. Enchanters use something for Runes.
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