Five-by-three-and-a-half-millimeter oval blue composite turquoise with oval lapis lazuli and oval malachite silver hoop earrings with oxidized finish and push backings - the Southwest hoop earring that combines three historically significant blue-green stones in a single piece. Turquoise provides the sky blue; lapis lazuli adds deep navy; malachite contributes vivid green. Together on an oxidized silver hoop, the three stones create a natural material spectrum from sky blue to deep navy to forest green.