No idea if this is something someone might want for projects or dust fodder, no harm in finding out.
The jewel appears to be a powerful relic that can convey wondrous abilities on its wielder. It has the following property:
Property: Consummate Professional (Rank 1 of 5)
Rarity: Common
Mnemonic: consummate
Description: Your profession service endrolls receive a bonus of 5/10/15/20/25. This bonus is doubled for services to armaments.
You note the telltale filaments of a lesser binding shimmering around the beryl jewel. You can sense that the jewel is bound to you, but a sufficiently skilled artificer should be able to dispel the binding.
MB: 6M