A Small Container of Gems

A Small Container of Gems is the reward for completing the quest Quest:Blueleaf Tubers. It contains a 6-slot Jewelry Box as well as one or more of the following gems: Shadowgem, Tigerseye, Malachite, Small Lustrous Pearl, Iridescent Pearl, Moss Agate, Lesser Moonstone, Jade.

Source
This item is a reward from the quest Quest:Blueleaf Tubers which starts with Mebok Mizzyrix in Ratchet in the Barrens.