The 
Shatter Essence enchantment profession buff can be pretty useful. Some players, like Ezzeze, are tired of searching for the spell and then the reagent every time they want to do some enchanting. To address this, they needed a macro that would spend the specific reagent they wanted, 
Crystalline Powder. When they expressed their need for help, a great hero emerged from the shadows. Plus_Singer_6565 shared a macro that shatters a Crystalline Powder from your inventory.
Creating the Macro
To make things simple if you haven’t done macros before, simply do Esc -> Macros, or just type /macro. Click on new, give it a name, add icon, and paste the code below:
/use Enchanting
/run C_TradeSkillUI.CraftRecipe(445466) C_TradeSkillUI.CloseTradeSkill()
/use item:213610
Once saved, you can drag your macro onto an action bar and you are all set! Ezzeze confirmed that the macro worked flawlessly with a lot of time saved.