Health & Beauty > Personal Care > Hair Care > Hair Styling Products Beauty > Hair > Tools & Accessories in stock Act + Acre Scalp Gua Sha Comb: Ready to ship in 2-3 business days. Use this gorgeous hand-cut jade comb for an invigorating gua sha massage for your scalp. Based on the ancient Chinese therapy of gua sha—which involves smoothing a sculpted massage tool over the face or body—a massage with this comb feels absolutely incredible (especially after using the Cold Processed® Scalp Detox tonic).Stimulating for the scalp and relaxing for the spirit, it’s our new favorite daily ritual. Jade mineral stone.