Bauxite isn't a crystal in the traditional sense, and that's actually the interesting part. It's a sedimentary rock, discovered in 1821 by French geologist Pierre Berthier near Les Baux in southern France, which is exactly where the name comes from.
Today it's best known as the world's primary source of aluminum, so the same rock that shows up as jewelry here is also, at industrial scale, the raw material behind aluminum foil and soda cans.
What makes gem grade bauxite cabochon material stand out is its pisolitic texture, small rounded mineral nodules packed together that create the spotted, almost bubble like pattern running through the brown and black surface.
No two cabochons show quite the same density or spacing of spots, so a lot like this gives you real visual variety even though it's technically the same rock throughout.
If you've searched bauxite healing properties, it's often tied to emotional awareness and a heightened sense of others' intentions, a less common association than the grounding themes attached to most earth toned stones.
Since patterned brown stones like Botswana agate can look similar at a glance, it's worth knowing bauxite specifically by its duller, more matte spotted texture rather than agate's glassier banding.