The Diamond is Mine Hunt is organized by Sophistishapes and involves 78 stores.
You can find all the info, the hints and even the pictures of the prizes on the official blog, here.
Let me show you the prizes I liked most.
Sweater: House of Rfyre, Hollis Woman Black Slash Sweater
Pants: CheerNo, List Pants
Headband: FluiD Furniture - Le Temps de Glamour Mini-TopHat Headband
Eyes: Kosh - Suree Eyes (the prize is a fatpack)
Lipstick: AtomicBambi - Sabrina Lip Chocolate (tattoo layer, the prize is a full palette)
Prim Nails: Studio Nails - Black and White 2 Square
Skin: Glam Affair, 10L department
Necklace: Dirty Word
Shoes: Stiletto Moody