Kind of would make me nervous to place my “real”diamonds and rubies in the dishwasher but if they say it’s dishwasher safe, it’s safe!
Dishwasher Cleaning Jewelry “Egg” makes diamonds look like new! No harsh chemicals necessary. Simply hang the egg in the dishwasher with your jewelry locked safely inside and let hot water and detergent’s built-in degreasers rejuvenate lackluster surfaces into a brilliant shine in no time. Safe for use with most fine jewelry with faceted stones (not glue mounted).
More info: Jewelry in Dishwasher Cleaner