Corundum is said to promote insight into the unknown, promoting wisdom and wise choices. It is also believed to subdue emotional tumult by relieving tension, releasing anger in a positive manner and reducing the presence of negative thoughts. It is also believed to enhance intuition.
Corundum is hard and tough–but not indestructible. It can usually be safely cleaned in either steam or ultrasonic cleaners, unless harboring hidden fractures or cavities. If in doubt, use lukewarm soapy water and a soft brush; rinse well and pat dry. Corundums can be sensitive to mild acids, so remove corundum jewelry before perspiring.
With its hardness and durability, corundum can be used in jewelry designs that see high traffic or likelihood of impacts: bracelets, rings, anklets, etc. Use corundum according to its color. If red, consider designing as if it were ruby. If blue, the uses of sapphire are a good guideline. Colorless corundum, of course, can go anywhere!