These are faceted glass ball stud earrings (often sold as multipacks or multipair starter sets).
Cut: Round, full-dome briolette or fire-polished faceted cuts.
Colors: Translucent hues including berry/mauve pink, deep plum purple, smoky gray, and dark steel blue.
Design: Clear or colorful glass spheres without an outer metal rim, maximizing how light filters through the facets to cast vibrant colored reflections onto the skin or white card backing.