There's now a newas the old one was hacked and deleted.
Sentient Jewels contain the essence of sentience that is used to create a Sentient Weapon.
A Sentient Jewel is not the same as a Filigree, but is a prerequisite for adding those to a weapon.
Where to get Jewels?
|Jewel||Tobar the Smith||Ravenloft Saga||Other|
|Blackrazor||White Plume Mountain|
|Covetous||The Curse of Strahd|
|Kobold||Party Favor turn-in|
|Timid||Vistani Totem turn-in|
|Wave||White Plume Mountain|
|Whelm||White Plume Mountain|