Midnight

he planet's diamond-based geology was active. Diamond falls were a common occurrence. Midnight even had a Sapphire Waterfall. Earthquakes were thought to be impossible though. The planet had been left in silence for millions of years before humanity took over. The planet had no atmosphere and due to the destructive xtonic radiation of its sun it was thought that no life was possible on the planet, be it carbon-based, hydrogen-based, silicates, gas beings or other.