This mod adds crafting recipies for Black Soul Gems, Azuras Star and The Black Star.
You can craft them at a normal Blacksmith Forge.
You need the "Arcane Enchanting" Perk for crafting them.
It's more like a duplication, so you can't craft it before doing the quest.
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Recipies:

2x Azuras Star:

• Azuras Star
• 5x Grand Soul Gems
  

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The Black Star:

• Azuras Star
• Black Soul Gem
  

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2x The Black Star:

• The Black Star
• 5x Black Soul Gems
  

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Black Soul Gems:

• 5x Refined Soul Gem Fragment
  

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Refined Soul Gem Fragment (the mod provides 5 versions of this recipe, because there are 5 different
Soul Gem Fragments):

• Soul Gem Fragment
  

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Now added:
Azuras Star:

• The Black Star
• Grand Soul Gem
  

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inspired by Windrider494's Soul Gem Chest plus Craftable Azuras Star