If a stone has a power, you must use the power in order to get the abilities attached to the stone for 1 day. Changing the stone will remove any powers given, but they will be given back for the rest of their duration if you re-select the stone again

Apprentice:
+100 magicka
+100% magicka regen rate
+15% spell absorb
-100% magic resist
This stone is for the mage that likes to gamble. The extra magicka and spell absorb can come in handy, but the weakness to magic might be the
cause of your death if you aren't careful

Atronach:
-75% magicka regen rate
+35% spell absorb
-8% spell cost
This stone is for the mage that wants to rely more on spell absorption than magicka regen. Because of the lower regen rate, the lower spell costs
can let you cast more spells in battle

Lady:
Each attribute regenerates 5 points per second
Ladies take 10% more damage from weapons
This stone is for a balanced build that wants to regenerate stats in battle, but needs armor to overcome their weakness

Lord:
Each attribute regenerates 30% faster
Lords take 10% more damage from magic
This stone is another one for balanced builds, being the counterpart to the lady stone but needs enchantments to overcome their weakness

Lover:
New power: Lover's Affection: Calms and disarms all surrounding opponents for 30 seconds
After using Lover's Affection, illusion and restoration spells are 20% more powerful, and cost 20% less
After using Lover's Affection, one-handed and two-handed weapons deal 20% less damage
This stone is for the player that likes to play puppet master or priest, and doesn't like fighting or relies on their follower

Mage:
+35 magicka
+35 magicka regen rate
-12% spell cost
This stone is for the mage that wants an all around buff in their magical abilities

Ritual:
Ritual Power lasts for 6 hours now
-50 health after using power
-25% conjuration cost after using power
conjuration spells are 25% more powerful after using power
This stone is for the necromancer that wants to have a lot of followers to counteract the health punishment

Serpent:
New power: Viper's Kiss: silently paralyzes surrounding opponents for 5 seconds and deals 3 poison damage per second for 60 seconds
+15 speech after using power
+15 alchemy after using power
0.5 muffle after using power
+30% faster after using power
-30% fire and frost resistance after using power
This stone is for the person that likes to have a bit of chaos. Being able to paralyze a large group of opponents and then kill them before they kill
you with fire

Shadow:
+30% sneak
1.0 muffle effect
2x sneak attacks
+25% movement speed
-30 carry weight
Shadows take 25% more damage than normal
This stone is for the assassin that likes to kill via sneaking, since you won't live long in a fight

Steed:
+75 carry weight
Armor weighs nothing and doesn't slow you down
+75% movement speed
+100% noisier
This stone is for the player that likes to rush in fast and dart away from danger. Trying to sneak by is futile, since opponents are much more likely
to hear you

Thief:
+40 carry weight
+20% movement speed
+15% lockpicking, pickpocketing, and sneaking
This stone is for the basic thief that comes in fast and gets away before people realize what's been stolen from them

Tower:
+50 armor rating
+25% magic resistance
+20% reflect damage
-10% movement speed
This stone is for the tank players that want to live long and don't care about their speed being hindered

Warrior:
+20% melee damage
+60% stamina regen rate
This stone is for the basic warrior that wants to dish out power attacks and cripple their foes as fast as possible