Finish Nameless story, you should get that by sleep until morning at your home, if you don't have that story yet then you should finish The Lizard's Curse.
You can craft your no-horny potion at your home with the tool icon (not herbalism).
I don't remember exactly where I got pearls.. maybe it was at the beach in front of the Murcad cove? (You can get there by doing sidequests for Scar)
Get Dulrig's likes above 15, show glafire- and emerine stone to him, you can get the emirine stone at the emerine hideout behind the mid-left door in the Munbury complex (have 15 perception).
Unfortunately I don't remember where I got the glafire stuff, you could just use preferences/cheats to add 1 glafire stone...
Do the Munbury trip activity couple of times with him and help him out with mining when you're there, after a while he will give you a discount. (...or did he give the discount already by showing glafire stone?)