Hexaplex trunculus degrades, resulting in blue only. Nonetheless, archeologists have confirmed Hexaplex trunculus as the species used to create the purple-blue dye; large numbers of shells were recovered from inside ancient live-storage chambers that were used for harvesting. Apparently, 10- to 12,000 murex yielded only one gram of dye. Because of this, the dye was highly prized. Also known as "Royal Purple", it was prohibitively expensive and was only used by the highest ranking aristocracy. A similar dye, "Tyrian purple", which is purple-red in color, was made from a related species of marine snail, "Murex brandaris". This dye (alternatively known as "imperial
Tyrian (video game) the planet Tyrian, which is located near the territory of the Hazudra, who are a lizard-like race. One day, Buce Quesillac, a Hazudra and Trent's best friend, is shot in the back by a hoverdrone which quickly disappears into the sky. Buce lives just long enough to tell Trent that the attack was the work of MicroSol, the giant corporation that controls the terraformation of Tyrian. They want Buce dead because of his knowledge of Gravitium, which is a special mineral, unique to Tyrian, able to control the force of gravity. Microsol wants to use Gravitium to power their warships,