Crafting

Gold bar + gem cost (or sand + soda ash) against selling the finished product on the Grand Exchange, with the 2% tax already applied.

Item	Confidence	Level	Ingredients cost	Revenue	Profit
Diamond ring	100	Crafting 43	1,796	1,909	113
Emerald ring	100	Crafting 27	508	588	80
Ruby ring	100	Crafting 34	925	1,005	80
Sapphire ring	100	Crafting 20	332	401	69
Molten glass	100	Crafting 1	23	82	59
Dragonstone ring	94	Crafting 55	10,940	10,576	-364
Onyx ring	0	Crafting 67	2,672,115	1,761,373	-910,742