Where to get Black Augurite in Pokemon Scarlet

Honestly, just trade for it. Much faster than hoping for a random drop.

Black Augurite is a pretty elusive item, but no worries, I got you! You wanna head to the area around East Province (Area Three) and South Province (Area Five). These areas are prime for finding Black Augurite, either by defeating and catching wild Tinkatuffs or Tinkaton, who often drop it, or by scouring for sparkling items on the ground that might just be what you're looking for. Happy hunting!