Quartz Quadrant

From the Sonic News Network, the Sonic Wiki

Quartz Quadrant is the fourth round from the game Sonic the Hedgehog CD. It follows Tidal Tempest and precedes Wacky Workbench.

Quartz Quadrant is a busy mine that collects quartz on conveyor belts and platforms.In the past, it is a swamp where technology was scarce. A very large quanity of quartz remains underground. It is an over mechanized, rust colored mine under Robotnik's influence in the bad future. Absolotely no quartz can be found here. It is an underground, golden-colored city that could be made of quartz in the good future. There are no active mines or swamps here though.