using the diamond building wand it does not show the durability (In numbers as in 10/120, Even after enabling advanced tooltips [f3+h]) Causing the ProjectE Repair talisman to NOT work on it.
it shows durability in the form of the bar itself (that turns from green to yellow-brownish over time).

https://github.com/FTBTeam/FTB-Presents-Stoneblock-2/issues/220

Same for in Sky Odyssey: FTBTeam/FTB-Sky-Odyssey#321

This also causes the EMC value to disappear.