Raysha is a standard hydrogen-helium gas giant with traces of sodium and ammonia in its atmosphere.
During the brief "gold rush" to Klensal, a few companies established an infrastrutural for helium-3 skimming and deuterium mining on Raysha's icy moons. When Klensal proved to be less wealthy than expected, the facilities were stripped for parts and abandoned.
Mass Effect: Infiltrator·The Final Hours of Mass Effect 3·Galactic Codex: Essentials·Mass Effect Galaxy·Revelation·Ascension·Retribution·Redemption·Evolution
Soundtracks
Mass Effect Original Soundtrack·Mass Effect 2 Original Videogame Score [Atmospheric·Combat·Kasumi's Stolen Memory·Overlord·Lair of the Shadow Broker] ·Mass Effect 3 Original Videogame Score [Extended Cut·Citadel·Leviathan] ·Mass Effect: Andromeda - Original Soundtrack