Gems

Crystal Survey	Gem	Value	Primary Skill	Secondary Skill	Other comments
N/A	Rubywall Crystal	50	N/A	-	Used in Surveying
Blue	Amethyst	100	Teleportation	-	Favor item for Mu, Sem, Ratuk the Thinker
	Azurite	100	Bard	-	Favor item for Mu, Sem, Percussa
	Blue Spinel	100	Staff	-	Favor item for Mu, Sem
	Fluorite	100	Animal Handling	Meditation	Favor item for Gisli, Mu, Sem
	Lapis Lazuli	100	Priest	Alchemy	Favor item for Mu, Yetta, Gloria Stonecurl, Sem
	Obsidian	100	Knives	-	Favor item for Helena Veilmoor, Mu, Suspicious Cow, Sem
Green	Aquamarine	100	Fishing	Teleportation	Favor item for Ratuk the Thinker
	Bloodstone	100	Cooking	-	Favor item for Nishika, Sie Antry, Selaxi
	Malachite	100	Cow, Pig, Deer, Spider, Bat, Rabbit	-	See Sigil Scripting recipes
	Peridot	100	Archery	Calligraphy	Favor item for Percy Evans, Bellema Deftwhisper
	Tourmaline	100	Combat Psychology	-
	Tsavorite	100	Ice Magic	Geology	Favor item for Ratuk the Thinker
White	Diamond	100	-	-	Can be used in Resurrection spell
	Quartz	100	Fire Magic	-	-
	Onyx	100	Shield	Armor Patching, Tanning, Leatherworking	Gift to Kleave, Lamashu or Yasinda for favor See Sigil Scripting recipes
	Agate	100	Unarmed	-	-
	Winterprize	100	-	-	Used in Geology Recipes to create Maximized gems Can be used in resurrection spell
	Moss Agate	100	Hammer	-	Gift to Falkrin Overstrike or Brianna Willer for favor
	Moonstone	100	Lycanthropy	-	Favor item for Gurki, Sanja
Orange	Carnelian	100	Sword	-	Gift to Janet Lews for favor
	Citrine	100	Battle Chemistry	-	Gift to Leonard Allenson for favor
	Garnet	100	Druid	First Aid	Favor item for Yalox, Lady Windsong See Sigil Scripting recipes
	Topaz	100	Mentalism	-	Gift to Nightshade or Baroness Marith Felgard for favor
	Sardonyx	100	Warden	Tailoring	Gift to Jaime Fatholm for favor
	Serpentine	100	Necromancy	-	Gift to Daniel Murderdark for favor
Ilmari	Ruby	200	Survival	-	-
	Sapphire	200	Survival	-	-
	Tiger's Eye	200	Survival	-	Used in Saddlery
	Turquoise	200	Survival	-	Used in Saddlery
	Danburite	200	Survival	-	-
	Emerald	200	Survival	-	-
	Goshenite	200	Generic	-	-
	Morganite	200	Survival	-	Used in Saddlery
	Opal	200	Survival	-	-
	Sunstone	200	Generic	-	-

Comments

• In addition to the above possibilities for favor, any gem can be used for favor with Azalak, Blanche, Echur, Larsan, Preta, Spot, or Urzab.
• Gems are used in various crafting recipes to create Enchanted equipment. They're placed into the Primary Crystal and Auxiliary Crystal slots.
• Danburite can currently be used for Endurance mods (Endurance/Treasure_Effects),^{Needs confirmation} possibly including extraction of augments. ^{Needs confirmation}.
• Goshenite and Sunstone are permanently set to Generic mods (All_Skills/Treasure_Effects), confirmed by Citan in Game_updates/2018-06-20.
• The other "Ilmari" gems and Rubywall Crystals are currently set to Generic mods^{Needs confirmation} .
• "Ilmari" gems earned their name from their introduction in the 1 July 2015 update, introducing both these 'gems for high-level skills that aren't yet implemented' which were 'added early so that their associated dye colors could be made', and the Ilmari region.
• Diamonds are used for the resurrection ability(2 each).
• From the introduction of the Winter Nexus on 16 November, 2014 until 21 September, 2018 Winterprize gems could also be used for the resurrection spell (2 each).