You see an orichalcum pearl.
It weighs 0.30 oz.
Notes
Has special properties that enables them to be used for magical methods of travel, which can only be utilised by Premium players, however. Looks the same as the White Pearl. It's suggested to always have a few of these in your backpack.
You need to complete the Astral Portals mission in The Explorer Society Quest to be able to buy and use them.
Lets you travel from Port Hope to Northport (near Carlin) or back. The same applies for Liberty Bay to Svargrond. Also needed to use the teleports in the Knightwatch Tower after you complete the Dreamer's Challenge Quest.
Can be obtained from the Pits of Inferno Quest and from Gooey Masses.