You can use it to enchant an item, or use it to recharge an item that is running low on power.
No. Soul Gems are used for enchanting and recharging magic items.
most alchemy shops will sell them. try the imperial city market district.
Basically, Any sentient human being or dremora soul can be placed inside the gems, and will automatically equal to a Grand soul (highest level soul in the game)
Black Soul Gems are the only soul gems that can trap the soul of an NPC, including all ten playable races, and NPC daedra such as Dremora, and Shivering Isles' Aureals and Mazken.
Select the weapon in your inventory, you'll see the usual options to drop or equip at the bottom of the screen, but there should also be a Recharge option. Select this, and you'll be prompted to select the filled soul gem you wish to use to recharge it.
GET soul gem and unlock the soul gems upgrade
you find sunburns soul gem in his adventure packs level
Darklight krypt is where you find sunburns soul gem
In Skyrim you can either take them from a person you have killed or more commonly they are found as random loot, usually in caves where a lot of necromancers live. They can also be crafted with the lightning attractor in the Soul Cairn (Dawnguard DLC), can be found from geode veins in Blackreach and can be purchased from Enthir in Winterhold and Falion in Morthal.
Whirlwind's soul gem is on Chapter 17, Creepy Citadel. After the little goblin puzzle, there is a platform with two Gargantulas. Defeat them to open the gate and get the soul gem. Hope this helped.
Sorry I don't know but I know where Sunburns soul gem is it is in Dragon's Peak about 5 minutes into it lean of the island and there is a dragon waiting there to take u to his soul gem
There are two ways to get your weapon enchanted or "special." The sigil stones you get from closing oblivion gates have two enchantments on them: an offesive one for your weapon or a defensive one for your armor. If you are the Arch-Mage, then you can use the Altar of Enchanting to enchant your weapon, provided you have a filled soul gem available.