A Mystical Skyfire Diamond is a meta gem with a 15% chance to grant 6 seconds of 320 Spell Haste Rating, with a 45 second internal cooldown. The buff given is called focus. The gem can proc off instant casts, but they will not consume focus.
Source[]
This item is crafted with Jewelcrafting (365); taught by [Design: Mystical Skyfire Diamond], a world drop.
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1x [Skyfire Diamond] |
Patch changes[]
Patch 4.2.0 (2011-06-28): Now stacks to 20.
Patch 2.4.0 (2008-03-25): The 1 Focus effect now lasts for 4 seconds and increases Spell Haste Rating by 320.
Patch 2.3.0 (2007-11-13): A cooldown has been added to this item's effect, but the chance for it to trigger has been increased.
Patch 2.1.0 (2007-05-22): The triggering rate on this item has been increased, but it now only reduces the cast time on spells by half; and Warlocks casting
[Corruption] with maximum ranks in
[Improved Corruption] will no longer consume the Focus buff from this gem.
Patch 2.0.3 (2007-01-09): Added.