Jewelry comes from Gemstone, raw stone and ore, and then cut into gems. That is to say, the raw materials of gems are decomposed from ores.
What the project needs is the ingot after the ore is melted, which can then be used to make various engineering instruments.
Forging also requires ingots of molten ore to build equipment and weapons.
Speaking of making G from ore, I suggest selling ore directly and putting it in the auction house. If you need ore, you can buy it directly at the auction house. The landlord wants to sell finished products, and you can't guarantee to make money. Most of the projects are for personal use, and motorcycles can make money, but this part is very expensive and can't make much money. Forging is the same. The finished product can only break even, but jewelry can earn a little, and you need to make a gem mount to make more money.