Bonuses for spell penetration can be found on blue, green, and purple gems, but the [Mysterious Fire Opal] currently provides penetration as well. This is believed to have been an error in its itemization, but Blizzard has thus far made no mention of fixing it, which makes it a valuable gem for filling yellow sockets in PvP gear for DoT-based casters (who do not typically care about spell crit and may prefer spell penetration to intellect).
| Color | Name | Effect(s) | |
|---|---|---|---|
 Blue
|
 [Stormy Azure Moonstone] |
+8 Spell Penetration | |
 [Stormy Star of Elune] |
+10 Spell Penetration | ||
 [Stormy Empyrean Sapphire] |
+13 Spell Penetration | ||
 [Stormy Chalcedony] |
+15 Spell Penetration | ||
 [Perfect Stormy Chalcedony] |
+18 Spell Penetration | ||
 [Stormy Sky Sapphire] |
+20 Spell Penetration | ||
 [Stormy Majestic Zircon] |
+25 Spell Penetration | ||
 Green
|
 [Radiant Deep Peridot] |
+4 Spell Penetration | +3 Critical Strike |
 [Radiant Talasite] |
+5 Spell Penetration | +4 Critical Strike | |
| [Radiant Chrysoprase] |
+5 Spell Penetration | +5 Critical Strike | |
 [Radiant Seaspray Emerald] |
+6 Spell Penetration | +5 Critical Strike | |
 [Radiant Dark Jade] |
+8 Spell Penetration | +6 Critical Strike | |
| [Shattered Dark Jade] |
+8 Spell Penetration | +6 Haste | |
| [Tense Dark Jade] |
+8 Spell Penetration | +6 Hit | |
 [Perfect Radiant Dark Jade] |
+9 Spell Penetration | +7 Critical Strike | |
| [Perfect Shattered Dark Jade] |
+9 Spell Penetration | +7 Haste | |
| [Perfect Tense Dark Jade] |
+9 Spell Penetration | +7 Hit | |
 [Radiant Forest Emerald] |
+10 Spell Penetration | +8 Critical Strike | |
| [Shattered Forest Emerald] |
+10 Spell Penetration | +8 Haste | |
| [Tense Forest Emerald] |
+10 Spell Penetration | +8 Hit | |
 [Radiant Eye of Zul] |
+13 Spell Penetration | +10 Critical Strike | |
| [Shattered Eye of Zul] |
+13 Spell Penetration | +10 Haste | |
| [Tense Eye of Zul] |
+13 Spell Penetration | +10 Hit | |
 Prismatic
|
 [Stormy Dragon's Eye] |
+43 Spell Penetration | |
 Purple
|
 [Mysterious Shadow Crystal] |
+8 Spell Penetration | +7 Spell Power |
 [Perfect Mysterious Shadow Crystal] |
+9 Spell Penetration | +8 Spell Power | |
 [Mysterious Tanzanite] |
+5 Spell Penetration | +6 Spell Power | |
 [Mysterious Twilight Opal] |
+10 Spell Penetration | +9 Spell Power | |
 [Mysterious Dreadstone] |
+13 Spell Penetration | +12 Spell Power | |