Native American Sterling Silver Sugilite/Charoite Cuff Bracelet Signed Navajo

Native American Sterling Silver Sugilite/Charoite Cuff Bracelet Signed Navajo. Not sure about what the stone is, I’m sure it’s obvious to someone who knows gems and minerals better than I do. Please feel free to message me with clarifications as I don’t want to have an inaccurate listing. Measures approx 5.5” inside tip to tip with a 1.25” gap. Weighs just over 19 grams. Stamped Sterling and signed by the artist with a WF. Not sure the artists actual name however.