Would it be possible to simplify jewellery? Get rid of the schematics by material and just have one per type (necklace, hoop, etc.) - like cooking has one recipe per type (bowl, plate, etc.).
Then add the ability enabling adventures to:
DESIGN <sketch> MATERIAL ADD|REMOVE [[#] <material>] (for Jewellery only)
The material would be most of what's already able to be rifted within that section of the rift, such as bone, cloth, coal, gems, gold, ice, iron, lacquer (for glass), leather, obsidian, horn, platinum, rope, silver, steel, and wood.
This would give adventurers more freedom in designing things created from materials currently unavailable, like wood or rope. As with anything, there would be a bit of a learning curve but once in place, it could also help cut down on the number of questions, issues, complaints, etc.
For example, when creating "a black diamond navel ring" which, upon examination appears as "A curved barbell of darkest obsidian forms the base of this body piercing. Carved into the shape of a Vashnarian wildflower, the top ball secures the adornment in place. A prong-set black diamond dangles from the bottom of the navel ring, the gemstone glittering in the presence of light." one would use the newly available "a schematic for a plain navelring" (which would replace the six types currently listed) and the commands:
DESIGN SKETCH MATERIAL ADD 1 OBSIDIAN
DESIGN SKETCH MATERIAL ADD 1 GEMS
to add the two materials mentioned within the design.