SC 4.7.2
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Type: Raw Mineral (Ship Mining) Value Tier: Low-Medium Refined Product: Corundum A crystalline form of aluminium oxide, corundum is one of the hardest naturally occurring minerals. In its gem-quality forms, it is known on Earth as sapphire and ruby. In the UEE, industrial-grade corundum is used extensively in abrasives, optical components, and as a substrate for electronics. Found in moderate quantities on various moons in the Stanton system.