If my math is correct for a group of 6 toons with zero failed combines...

Shopping List:
Black Sapphire x30
Blue Diamond x30
Diamond x30
Jacinth x30
Velium Bar x60
Small Block of Clay x30
Water Flask x42
Ruby x120
Poison Vial x30
High Quality Firing Sheet x30
Dairy Spoon x6
Corking Device x6
Needle Mold x6
Small Piece of Ore x12
Mixing Bowl x1
Sewing Kit x1 (6 if you don't want to trade kit to each toon)
Jeweller's Kit x1 (6 if you don't want to trade kit to each toon)
Scent of Marr x6
Celestial Solvent x6
Smithy Hammer x6
Glass Shard x6
Silver Bar x6


Combines (all on 1 toon - Enchanter to speed it up)

Enchanter Cast Spells:
Greater Mass Purify Mana
Mass Purify Mana

Mixing Bowl:
Celestial Essence x6

Forge:
Metal Bits x6
Embroidering Needle x6

Pottery Wheel:
Mounted Black Sapphire x30
Mounted Blue Diamond x30
Mounted Diamond x30
Mounted Jacinth x30
Unfired Artisan's Seal x30

Kiln:
Artisan's Seal x30

On each Character:
Oven:
Dairy Spoon + Artisan's Seal

Brew Barrel:
Corking Device + Artisan's Seal

Sewing Kit:
Embroidering Needle + Artisan's Seal

Forge:
Smithy Hammer + Artisan's Seal

Jeweller's Kit:
Glass Shard + Silver Bar + Artisan's Seal