Soul Gem

Crafted from gems or exchanged with the Ideal Masters, soul gems are used to store magical energy. Regular soul gems can be filled with non-humanoid souls of those who fell victim to the casting of Soul Trap.

Uses

Properties

Soul gems are crafted from common gems such as sapphires, rubies, emeralds etc. They can be crafted by one who is proficient in the Arcana skill, who performs a 1 hour long ritual while holding the gem and expending a spell slot.

Spell Slot Level Expended	Obtained Soul Gem	Cost Empty (GP)	Max Soul Level Held (CR)
1st	Petty	10	1
2nd	Lesser	50	2
3rd	Common	100	4
4th	Greater	500	6
5th	Grand	1000	10

As such a Grand soul gem can hold the soul of a creature up to CR 10, but a soul stored in the gem may be of a lower CR. To determine the CR of the soul held inside the soul gem, you need to cast the identify spell on the soul gem.

Recharging Magic Items

Soul gems can be used to replenish charges to magic items. A magician who is proficient in the Arcana skill needs to perform a 10-minute ritual while touching both the soul gem and the item to be recharged. Depending on the CR of the soul used, a number of charges are gained. A CR 1 soul replenished one tenth of the charges, while a CR 10 soul replenishes all charges (always round up when determining the number of charges restored). Furthermore, the soul gem can only restore charges to items that can regain charges. After the recharging process, the soul gem is left empty and dull.

Creating Spell Scrolls

To create a spell scroll, a character needs to crush a soul gem into powder, mix it with ink, and scribe the scroll with this ink. This process takes time (at least 8 hours per day) and a specific soul strength (as shown below). You cannot create a spell scroll of 6th level or higher with ordinary soul gems. Moreover, you must have the spell to be inscribed prepared or among your known spells and you must be proficient in the Arcana skill.

Spell Level	Crafting Time (days)	Required Soul Level (CR)
0th (cantrip)	1	Any
1st	2	1
2nd	7	2
3rd	21	3
4th	28	5
5th	5	8

Creating Magic Items

The creating of Magic Items is known as Enchanting , and the process can be viewed under the article.

Soul Gem stablocks

Petty Soul Gem

Petty Soul Gem

Wondrous Item

Common

Used to hold souls of those who fell victim to Soul Trap. Can hold a maximum of CR 1 soul. Value of the item is increased by 1/5 * the amount of XP of the soul stored. 

Cost: 10 gp

Lesser Soul Gem

Lesser Soul Gem

Wondrous Item

Common

Used to hold souls of those who fell victim to Soul Trap. Can hold a maximum of CR 2 soul. Value of the item is increased by 1/5 * the amount of XP of the soul stored.

Cost: 50 gp

Common Soul Gem

Common Soul Gem

Wondrous Item

Common

Used to hold souls of those who fell victim to Soul Trap. Can hold a maximum of CR 4 soul. Value of the item is increased by 1/5 * the amount of XP of the soul stored.

Cost: 100 gp

Greater Soul Gem

Greater Soul Gem

Wondrous Item

Uncommon

Used to hold souls of those who fell victim to Soul Trap. Can hold a maximum of CR 6 soul. Value of the item is increased by 1/5 * the amount of XP of the soul stored.

Cost: 175 gp

Grand Soul Gem

Grand Soul Gem

Wondrous Item

Rare

Used to hold souls of those who fell victim to Soul Trap. Can hold a maximum of CR 10 soul. Value of the item is increased by 1/5 * the amount of XP of the soul stored.

Cost: 300 gp