Precious stones

In The Witcher, there are several kinds of "gems", or precious stones. Most can be used as gifts or in exchange for goods or services:

Image	Name	Locations and uses	Buy	Sell
	Amber	wardrobe at the Reverend's house in the Outskirts sometimes also upstairs at the house across the street from the Reverend's sometimes in the trunk next to Triss' bed sometimes on Dagon's body after the duel in Act IV the druids in the cave in the Swamp cemetery will exchange this gem for potions	40	20
	Diamond	you can win a diamond from Zoltan in your first drinking contest with him the gossip in Act II will accept either red gloves or a diamond for a sexual encounter there is also a quest diamond (Gramps' Diamond) in Act IV, but it cannot be sold and looks entirely different the clerk at the town hall takes diamonds as gifts in return for sexual favours the druids in the cave in the Swamp cemetery will exchange this gem for potions	120	60
	Ruby	Salamandra often carry rubies the druids in the cave in the Swamp cemetery will exchange this gem for potions	80	40
	Sapphire	On Savolla's body in the Prologue In the "goal" trunk in the Crypt in the Sewers in Act II Wardrobe, 2nd floor, non-human barracks in Temple Quarter during Act III In the "goal" trunk in the Bandits' hideout (fisstech lab) in the sewers Blue Eyes takes sapphires as payment the druids in the cave in the Swamp cemetery will exchange this gem for potions	60	30

Notes

• The Teleportation Crystal which Kalkstein gives Geralt in Act II is also labelled as a gem, but it can neither be bought nor sold as it is a quest item.
• The swordsmith off the Trade Quarter marketplace will reforge a sword for any gem, rather than take gold as payment.