Bangle with oval colored stone cabochons,

Bangle with oval gemstone cabochons (amethyst ca. 17 x 8 mm, tourmaline ca. 21 x 10 mm), 18K yellow gold, 28.4 g, inner circumference ap. 17.5 cm, W (head/bangle): 26 mm/11 mm, late 20th century, minimal signs of wear.