You can make this at level 3, even. It's that easy.
1) Get bloodstones. (sell in Bazaar for 50-1sp ea or else a tier 5 mineral)
2) Create fossil temper (cost is about 12cp)
For about 1sp 12cp you can sell the fashioned item back for about 6sp thus making about 1.2 gold per stack.
You can create crudes, or pristines for 4X the amount (takes longer, though)
This only works with Bloodstones so far as I have found.
1) Get bloodstones. (sell in Bazaar for 50-1sp ea or else a tier 5 mineral)
2) Create fossil temper (cost is about 12cp)
For about 1sp 12cp you can sell the fashioned item back for about 6sp thus making about 1.2 gold per stack.
You can create crudes, or pristines for 4X the amount (takes longer, though)
This only works with Bloodstones so far as I have found.