Craft (Jewelry) costs

[Typhaaris]

In ultimate equipment there's a table of various gems, and the DC's to improve them based on the 50% chance that you end up getting an uncut gem. Below that there's a few paragraphs describing that you can make jewelry out of gems, which increases their grade by one, or two steps depending on if you go for jewelry with a single gem, or jewelry with multiple gems. Then it claims that 'unlike gems jewelry requires the appropriate raw materials to craft'. But there are no examples for how much each grade of gem might require in additional raw materials.

As an example, if I get a grade 6 gem and roll the greatest possible result for improving it, it would be worth 5,250 gp. If I were to then turn it into jewelry, I don't know how much I'd have to pay for the raw materials.

In addition if I have '2d6 gems of a lower grade', how much in raw materials would I have to pay then? This is unclear. Especially since the value of jewelry is randomized, unlike most craft checks, and I would expect that the value of the jewelry would be decided after it is made. Does anyone have any clarification on this?

[Marina, Servant of Wadjet]

OH wow that's weird, i might have to go read the book itself...um as a default 1/3 of the improved price is raw materials?

[Fuzzy-Wuzzy]

I kinda think you're looking at rules for the GM generating random treasure, not rules for characters making things, which ought to be deterministic. The text is confusing in this regard, though.

I suggest using the given DCs for improving a gem, because that rule is clear, and ignoring the stuff about creating jewelry---just go back to the CRB's Craft rules for that. If you want to create a piece of jewelry worth 30,000 gp, you need raw materials worth 10,000 gp. Presumably those raw materials are worked gems and some metal to stick them on, but that's all swept under the rug.

EDIT: Err, rules for characters making things ought to be deterministic in terms of the value of the raw materials and the value of the final piece; I'm not saying they shouldn't have to roll Craft checks.