Gems come in five varieties: affinity-shaping Elemental gems, Class-shaping Nemesis gems, Exceptional gems, which have high bonuses, Attack gems that must be used on weapons, and finally Protection gems, for shields only. Only Exceptional and Attack and Protection gems have an effect on both Element and Class. No gems have any effect on melee damage Type (Blunt, Edged, or Piercing). Nemesis gems have no effect on enemy magic when equipped to shields, as Magic ignores Class. For Defense calculations, Class and Affinity, and other values, are added together and the total divided by 100, and the result multiplied by total Strength or Intelligence (weapon plus Ashley's base STR or INT). For Attack, the divisor is 400 instead of 100.
All Major and Minor gems add 3 Agility. All Major gems add 1 Strength and 6 Intelligence, which adds .25% to total Strength in attack calculations and 1% in defense calculations. All Major gems add 6 Intelligence, which adds 1.5% to total Strength in spell attack calculations. The 6 intelligence adds 6% in defense calculations against magical attacks.
All Minor gems add 2 Strength and 4 Intelligence. Values for gems are added directly to WeapStr, WeapClass, and WeapAffinity, so they are used in all calculations that weapon strength, class and affinity are used in.[1]
Elemental[]
The elemental variety has two tiers: Major and Minor
Major Elemental[]
Major Elemental gems have a +30 bonus to one element. On Weapons, this is equivalent to 7.5% of the total Strength (or Intelligence, for magical attacks). On Shields, it is equal to 30%. Most Major Elemental gems have -15 to an opposed element (15% penalty to defense) and -5 to other elements (5%). The exception is Talos Feldspar, which has -5 to all non-Physical Elements.
| Name | Physical | Air | Fire | Earth | Water | Light | Dark | Description |
| Talos Feldspar | 30 | -5 | -5 | -5 | -5 | -5 | -5 | Feldspar imbued with the dark powers of Talos Increases the power of direct attacks |
| Djinn Amber | -5 | 30 | -5 | -15 | -5 | -5 | -5 | Amber imbued with the power of Sylphs Increases air affinity |
| Ifrit Carnelian | -5 | -5 | 30 | -5 | -15 | -5 | -5 | Carnelian imbued with the power of Ifrit Increases fire affinity |
| Dao Moonstone | -5 | -15 | -5 | 30 | -5 | -5 | -5 | Moonstone imbued with the power of Dao Increases earth affinity |
| Marid Aquamarine | -5 | -5 | -15 | -5 | 30 | -5 | -5 | Aquamarine imbued with the power of Marid Increases water affinity |
| Seraphim Diamond | -5 | -5 | -5 | -5 | -5 | 30 | -15 | Diamond with a seraph's soul bound inside Increases light affinity |
| Berial Blackpearl | -5 | -5 | -5 | -5 | -5 | -15 | 30 | Blackpearl with Berial's soul bound inside Increases dark affinity |
Minor Elemental[]
Most Minor Elemental gems have -5 to an opposed element (5% penalty to defense). The exception is Titan Malachite, which has no penalty.
| Name | Physical | Air | Fire | Earth | Water | Light | Dark | Description |
| Titan Malachite | 15 | 0 | 0 | 0 | 0 | 0 | 0 | Malachite with a Titan's soul bound inside Slightly increases the power of direct attacks |
| Sylphid Topaz | 0 | 15 | 0 | -5 | 0 | 0 | 0 | Topaz imbued with the power of the Sylphs Slightly increases air affinity |
| Salamander Ruby | 0 | 0 | 15 | 0 | -5 | 0 | 0 | Ruby imbued with the power of the Salamanders Slightly increases fire affinity |
| Gnome Emerald | 0 | -5 | 0 | 15 | 0 | 0 | 0 | Emerald imbued with the power of the Gnomes Slightly increases earth affinity |
| Undine Jasper | 0 | 0 | -5 | 0 | 15 | 0 | 0 | Jasper imbued with the power of the Undines Slightly increases water affinity |
| Angel Pearl | 0 | 0 | 0 | 0 | 0 | 15 | -5 | Pearl imbued with the power of the angels Slightly increases light affinity |
| Morlock Jet | 0 | 0 | 0 | 0 | 0 | -5 | 15 | Jet stone sealed with Morlock's magical power Slightly increases dark affinity |
Nemesis[]
Nemesis gems add Class bonuses, and have two tiers. Class bonuses are ineffective against enemy spell use.
Major Nemesis[]
Major Nemesis gems have a +30 bonus against a single Class of enemy. On Weapons, this is equivalent to 7.5% of the total Strength (or Intelligence, for magical attacks). On Shields, it is equal to 30% against melee attacks. Nemesis gems have no effect at all against enemy magic spells, other than the Intelligence value of the gem.
| Name | Human | Beast | Undead | Phantom | Dragon | Evil | Description |
| Orlandu [] | 30 | ? | Actonite containing a fragment of Orlandu's skeleton Increases power against humans. | ||||
| Ogmius [] | ? | 30 | Amethyst containing Ogmious the Guardian's soul Increases power against beasts | ||||
| Balvus [] | ? | 30 | Chiastrite containing the ashes of Balvus Increases power against undead | ||||
| Beowulf [] | 30 | Increases power against phantoms | |||||
| Sigguld 2 | ? | 30 | Fire agate with the soul of Sigguld the Dragoon Increases power against dragons | ||||
| Altema 2 | ? | 30 | Garnet containing Altema the Fallen's spirit Increases power against evil enemies |
- [] Chest only; Companions in Arms room in the Limestone Quarry
- 2 Second Iron Maiden; New Game Plus only
Minor Nemesis[]
Minor Nemesis gems have -3 to the two classes following their bonus (3% penalty to defense)
| Name | Human | Beast | Undead | Phantom | Dragon | Evil | Description |
| Haeralis | 15 | -3 | -3 | Star sapphire with the power of Haeralis the Brave Slightly increases power against humans. | |||
| Orion | 15 | -3 | -3 | Black coral holding the hair of Orion the Beast Slightly increases power against beasts | |||
| Iocus | 15 | -3 | -3 | Lazurite containing St. Iocus's prayer Slightly increases power against undead | |||
| Trinity | 15 | -3 | -3 | Jade containing the Nordic holy spirits Slightly increases power against phantoms | |||
| Dragonite | -3 | 15 | -3 | Serpentine containing a dragon's power Slightly increases power against dragons | |||
| Demonia | -3 | -3 | 15 | Blood opal containing the blood of devils Slightly increases power against evil enemies |
Multiple function[]
Note that a weapon or shield can only be one element at a time, and will display as such; it may be necessary to employ additional elemental gems to achieve the desired affinity. Because of this, Polaris, Basivalen and Galerian would be no more effective than a Major Elemental Gem of the desired affinity, even if their values were equal. They offer bonuses only a little higher than the Minor Elemental gems. They are adaptable to three different affinities, but gems do not really take up that much space. And they give a minus to Strength, which is actually weaker than Major Gems. The difference, then, is in the intelligence: double the intelligence of the Major Gems, for enhanced casting and defense against magic.
The other gems also do not compare favorably with their Elemental and Nemesis counterparts, although they each adapt to every situation (all six classes and all seven elements rather than three elements).
Multiple Element[]
- Polaris: An artificial malachite made by the ancient Kildeans, named after a legendary knight
- +20 to Physical, Air and Earth. -10 to other Affinities. -3 Strength, 12 Intelligence
- Basivalen: An artificial serpentine made by the ancient Kildeans, named after a legendary knight
- +20 Physical, Fire and Water. -10 to other Affinities. -3 Strength, 12 Intelligence
- Galerian: An artificial cat's eye made by the ancient Kildeans, named after a legendary knight
- +20 to Physical, Light and Dark. -10 to other Affinities. -3 Strength, 12 Intelligence
All Element all Nemesis[]
- Vedivier: An artificial amethyst made by the ancient Kildeans, named after a legendary knight
- +5 to all Classes and Affinities. 1 Strength, Agility and Intelligence
- Berion: An artificial moonstone made by the ancient Kildeans, named after a legendary knight
- +10 to all Classes and Affinities. 2 Strength and Agility, 3 Intelligence
- Gervin: An artificial topaz made by the ancient Kildeans, named after a legendary knight
- +15 to all Classes and Affinities. 3 Strength and Agility, 6 Intelligence
- Tertia: An artificial emerald made by the ancient Kildeans, named after a legendary knight
- +20 to all Classes and Affinities. 4 Strength and Agility, 9 Intelligence
- Lancer: An artificial ruby made by the ancient Kildeans, named after a legendary knight
- +25 to all Classes and Affinities. 5 Strength and Agility, 12 Intelligence
- Arturos: An artificial diamond made by the ancient Kildeans, named after a legendary king
- +30 to all Classes and Affinities. 8 Strength and Agility, 15 Intelligence
Attack[]
Both Attack gems can only be equipped on weapons
Both Attack gems give +3 to all Classes and Affinities
Both Attack gems give 2 Strength, 3 Intelligence, 4 Agility
Braveheart: Increases the success rate of non-magical attacks by 20%.
Hellraiser: Increases the success rate of magic by 20%
Protection[]
All protection gems can only be equipped on a shield
All protection gems give +3 to all Classes and Affinities
All protection gems give 1 Agility, except Nightkiller which gives 3 Intelligence and 5 Agility, and Manabreaker which gives 2 Strength and 5 Agility
Brainshield: Increases the chance to evade 'INT-down' by 20%
Dark Queen: Increases the chance to evade 'Paralysis' by 20%
Death Queen: Increases the chance to evade 'Poison' by 20%
Manabreaker: Increases the chance to evade magical attacks by 20%
Nightkiller: Increases the chance to evade non-magical attacks by 20%
Powerfist: Increases the chance to evade 'STR-down' by 20%
Speedster: Increases the chance to evade 'AGL-down' by 20%
Silent Queen: Increases the chance to evade 'Silent' by 20%
White Queen: Increases the chance to evade 'Numbness' by 20%. +1 Agility.