Gemstone
Gemstones (or jewels) were any of a number of mineral forms, typically crystalline, some of which were greatly valued as precious stones in many cultures. These included diamonds, emeralds, rubies, sapphires, topaz, Rigelian flamegems, and tourmalines.

By the 23rd century, it was possible to synthesize most of these in any quantity required, rendering them essentially valueless, though many were still traded for low-end commercial use such as Spican flame gems. In 2267, Korob attempted to bribe members of the  crew with such stones; his flawed research led him to believe that they would be swayed by such a fortune. ()

The Betazoid gift box sent to Deanna Troi in early 2364 contained numerous jewels that were spilled out as soon as the box had delivered its message. ()

The Folnar jewel plant, a plant native to Folnar III, secreted a resin that hardened into a gemstone. ()

Among the items and artifacts Vash secured in the storage locker of the assay office aboard Deep Space 9 in 2369 was a handful of assorted gems. ()

During first contact with the Wadi, they presented a bag of jewels to Quark as their wager in dabo. ()

Bajoran villagers presented Chief Miles O'Brien with a plate full of gemstones when he was temporarily chosen as their . ()

Upon announced as official mail carrier by Captain Janeway, Neelix told her to treat the mail like gemstones. ()

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