Brutalist Cuff Bracelet by Carvalhu Rio Citrine and Amethyst in Bronze 1970s

Vintage Cuff Bracelet by Carvalhu of Brazil. Brutalist or Modernist style with a purple amethyst and a citrine point. Dates to 1970s. Signed Carvalhu Rio. Measures 1 1/2" wide. the interior measures 5 5/8" plus the opening of 1 1/4". Weight: 44.5 grams.