You can transmute diamond from 15 ore per diamond. It requires a card crafting table.
The recipe costs 200 gold and can be purchased from:
Avery Templeton (Celestia Base Camp) Carcinos (Crustacean Empire) Felicia Worthington (Marleybone, Regent's Square) Kimba Kalla (Celestia Floating Land ~ Water-mole Village)
If you don't have a card crafting table yet you can buy one from the bazaar if they have any in stock or direct from vendors for 1500 gold. the following vendors have it:
Ea'rik (Krokotopia Krokosphinx) Nessa Lightblade (Dragonspyre Furniture and Castle Shop) Neville Cobblestone (Marleybone Real Estate & Fine Furnishings) Zhi Lan (MooShu Furniture and Castle Shop)
the answer is yes! you can transmute diamonds with a transmute diamond recipe that you can buy from Felicia Worthington in regent's square in marleybone for 200 pieces of gold, using this recipe will require a card crafting stationandan apprentice crafter's badge; you can buya card crafting stationfrom Ea'rik in the krokosphinx in krokotopia for 1,500 pieces of gold. and using the recipe to create a diamond will require 15 ores; ores can be scavenged up from the cave of solitude in mooshu (the part of it where a ton of bridges connect a ton of pillars). I hope this information was helpful, have fun