OnKitabie jewelry is made largely out of gold, bronze, and lapis lazuli. Lapis lazuli, or zilabie, serves as the currency of the various OnKitabie clans throughout Tiemakil Shike as well, as there are substantial mines for the mineral throughout the desert. Its deep blue luster and ability to be sculpted makes it more valuable than gold, a metal which the OnKitabie hold little economic value for anyways.
In general, due to the value of lapis lazuli, it is used as inlays on larger metal and fabric pieces of clothing. Most jewelry is embroidered or in some way integrated into larger articles of clothing as well, such as with lapis lazuli beads woven into the rim of turbans and robes. This is also the preferred method by lower classes and in urban areas, as it is harder to steal/pickpocket than a necklace or ring. However with the upper classes, necklaces and especially rings are prevalent, and it is considered to be a classical sign of great wealth to own two rings (one for each hand) carved purely from high-quality lapis lazuli. It should be noted as well that all genders tend to wear jewelry similarly. The only major distinction is that traditionally the nojal of the household who facilitate religious ceremony wear jewelry with turquoise highlights (assuming that the family has the finances to purchase the expensive gemstone) though that practice is slowly growing obsolete.
There are rarely distinct jewelers, as it is usually those who carve and refine lapis lazuli straight from the mines that also work it into jewelry. Occasionally this creates conflicts where the highest-purity lapis lazuli that is meant to go towards minting currency is instead used for carving rings and the like, since the carvers can get a far higher price for that. This has resulted in multiple laws being passed to prevent this by various different clans, and in the Miktaban many currency minters are pushing for permanently establishing separate jewelers to prevent future conflicts of interest.