Here is a Pocket Portal, it doesn't do anything but sit in the 5th pocket or on a shelf among all the other gear you collect.  Glow is Hyperglow: purple dayglow and purple after dark.  Core is heavily patinated brass, brass tube inserts scales are darkened brass and screws are partially countersunk brass. about 2" diameter by 3/8" thick

Pocket Portal Purple Glow brass hardware