This is going to sound very Noobish but...

 

 

 

How do I make the gem get into the ammy or necklace?

First you need to cut the gem with a chisel. Then get the corresponding mold (necklace mold, amulet mold, or ring mold). These can be bought at most crafting stores, like the one in Al Kharid.

 

 

 

 

 

 

 

Then take the gem, a gold bar, and the mold and use the gold bar on any furnace. It will give you the option of crafting the jewelry you want.

 

 

 

If you're making an amulet, you'll need a ball of wool to string it.

With the gem, gold bar, and correct mold in your inventory use the bar on the furnace. A menu will pop up. Just click the gemmed jewlery you wish to make. If you already have the jewlery theres no way to add a gem to it.

 

 

 

 

 

 

 

EDIT:^^beat me to it while I was typing. :evil: