Kinamantine

A brilliant gold, untarnishable Venusian metal that is supremely tough (almost as strong as Primary Adamantium) but very light and easy to work for Venusians, who have intrinsic metal control abilities. It cannot be forged or shaped easily using normal tools. It responds well to telepathic signals, and so is used widely in the production of psychic interfaces or for items that need to be controlled or steered by the mind.

It was used to forge the tiaras and Lunar Crescents of the Sol System Sailor Senshi back in the dawn of the Silver Millennium.