Quartz 2 Deluxe for iPhone

From Chillingo Ltd:

Quartz 2 Deluxe is a puzzle game for the iPhone and iPod Touch in which your goal is to clear the diamond-shaped matrix. Match at least four stones of diamond-shaped matrix of the same color and remove them from the field.Special stones like the wildcard and fire stones make this easier, but watch out for the blocker, frozen, nuclear and biohazard stones.

Note: The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries."