Version Info:
modpack-Dungeons Dragons & Space Shuttles v.6.3
forge-1.12.2-14.23.5.2807-universal
MysticalAgriculture-1.12.2-1.7.5
MysticalAgradditions-1.12.2-1.3.2
mysticallib-1.12.2-1.3.8

I recently enchanted my Infusion Crystal with Unbreaking III with the hopes it would help make it more durable during use.

Well, after converting thousands upon thousands of Inferium essence with it, I have great confidence to report that thel Unbreaking enchantment used on these crystals are being ignored.

See the screenshots below.

In this example, I placed enough essence for 60 conversions, and observing the durability before/after, you'll see the durability was used each and every operation.

Thank you for your time and this great mod! :2)

I don't plan on updating the 1.12 version anymore. I will add this to the 1.14 versions however.

This should be the case in 1.15