i had a geometry lesson while just trying to name these earrings. apparently "regular tetrahedrons" (all four facets are the same) are frequently referred to as just "tetrahedrons" so i guess that makes my new stud earrings "irregular tetrahedrons". these are the skeletal version of my solid "triangle studs". the triangle studs are irregular tetrahedrons too, but oh whatever, who cares. new earrings. freshly listed in my etsy shop. here.