Comments

Comment by 54475

Apparently dropped in Violet Hold, Heroic mode. (No further information available than this I'm afraid)

Comment by 161182

Like other WotLK Dropped JC patterns this one is a gaurunteed drop if there is a Jewelcrafter in the party that hasn't learned the pattern yet. I've confirmed this on the Armory which lists this as a 100% drop rate.

Comment by 323529

Yeah it just dropped from Heroic Violet Hold, As i was the only Jewelcrafter in the group, only i was allowed to roll :)

Comment by bwirum

Some designs are only available through drops, this is one of them.

All blue regular drop-only gem designs:
The Storm Peaks:
Design: Accurate Monarch Topaz - Mammoths in The Storm Peaks
Design: Defender's Twilight Opal - Stormforged dwarves in The Storm Peaks
Design: Fractured Scarlet Ruby - Nascent Val'kyr in Storm Peaks
Design: Radiant Forest Emerald - Frostfeathers in The Storm Peaks

Boss drops:
Design: Deadly Monarch Topaz - Keristraza, The Nexus (Heroic only)
Design: Deft Monarch Topaz - Shonnir the Ironshaper, Halls of Stone (Heroic only)
Design: Fierce Monarch Topaz - Ingvar the Plunderer, Utgarde Keep (Heroic only)
Design: Infused Twilight Opal - Anub'arak, Azjol-Nerub (Heroic only)
Design: Precise Scarlet Ruby - Herald Volazj, Ahn'kahet: The Old Kingdom (Heroic only)
Design: Thick Autumn's Glow - Cyanigosa, The Violet Hold (Heroic only)
Design: Timeless Forest Emerald - The Propeht Tharon'ja, The Drak'Tharon Keep (Heroic only)

Bind on Equip World drops (buy at AH):
Design: Champion's Monarch Topaz - World drop (BoE)
Design: Etched Monarch Topaz - World drop (BoE)
Design: Inscribed Monarch Topaz - World drop (BoE)
Design: Misty Forest Emerald - World drop (BoE)
Design: Purified Twilight Opal - World drop (BoE)
Design: Resolute Monarch Topaz - World drop (BoE)
Design: Shining Forest Emerald - World drop (BoE)
Design: Sovereign Twilight Opal - World drop (BoE)
Design: Stalwart Monarch Topaz - World drop (BoE)
Design: Tenuous Twilight Opal - World drop (BoE)

All meta drop-only designs:
Boss drops:
Design: Austere Earthsiege Diamond - King Ymiron, Utgarde Pinnacle (Normal and Heroic)
Design: Bracing Earthsiege Diamond - Cache of Eregos, The Oculus (Normal and Heroic)
Design: Eternal Earthsiege Diamond - Loken, Halls of Lightning (Normal and Heroic)

Bind on Equip World drops (buy at AH):
Design: Beaming Earthsiege Diamond - World drop (BoE)
Design: Destructive Skyflare Diamond - World drop (BoE)
Design: Thundering Skyflare Diamond - World drop (BoE)

Comment by 413672

This was a Subtle Scarlet Ruby, but with the gem conversion/clean-up in Cataclysm it was changed to a Subtle Autumn's Glow, and the ability to obtain the design was removed from the game. For anyone who might have wanted this design or cut, they will have to look for a Jewel Crafter who obtained the design prior to conversion, as the JC vendors in Icecrown and Dalaran do not sell it, and Cyanigosa no longer drops it (confirmed on doing Heroic VH on my Cataclysm Maxed JC).