I am trying to craft the ring of apotheosis and I need Diamond. I have no idea where to find it or how to get it. Can someone please tell me.
I use the transmute ore to diamonds, card craft table needed. I collect the ore from the common area in DS then enter to the library, collect the 2 there. I enter each door off it and something collect some there then I port back to common area switch realms and repeat. Usually every 20-35 ore collected I get a diamond saving me 15 extra ore.
If you have a lot of gold sometimes you can get them from the Bazaar by sitting there and refreshing the reagents screen but it seems to take almost as long that way.
If you're in Dragonspyre, I know a good ore-farming place. When harvesting this I get the occasional diamond.
It's in the Athenium and it's near where you find the stone rose. That passageway to the area where the stone rose is located is where the ore spawns. Realm hopping does wonders while collecting diamonds and the like.
When I had to do that quest as well as building my Watchtower Hall, I needed tons of diamonds. I planted a grove full of Frozen Fly Traps as well as transmuting from ore.
The Frozen Fly Traps would drop diamonds fairly regularly, and you can find ore all over the Spiral but there are a few good hunting spots. One is in DS as other people have said, the other is in Grizzleheim. I never did the changing realms trick, but on occasion did buy a bunch of ore at the Bazaar (yes you need 15 ore per diamond, but ore is considerably cheaper than buying diamonds.)