Greetings,
https://i.imgur.com/qykzbRp.png
The Silver, Electrum, and Gold items are in-game but the Platinum ring is missing. Two 250 JCs tried the combine for me.
http://everquest.allakhazam.com/db/item.html?item=4716
earliest post is Feb 07 2001.
https://web.archive.org/web/20010215...aft_imbued.htm
"As of Jan. 31, 2001, some imbued gems work in jewelcrafting."
"they were added with little fanfare during the January 31 patch."
http://wiki.project1999.com/Imbued_Diamond
p99 wiki links