Vintage Italian 18K Gold Multicolor Gemstone Bangle Bracelet

Vintage 18K yellow gold Italian hinged bangle bracelet, featuring an upside down design of two oval amethyst and two rectangular blue topaz set on the front. They are accented by a ruby and two sapphires in between stones.
2 Blue Topaz: 18 ctw.
2 Amethyst: 16 ctw.
1 Ruby: 0.15 ct.
2 Sapphire: 0.30 ctw.
Measurements:
Inner circumference: 6.5 inches
Width: 12.5 mm front - 6 mm back
Weight: 43.1 grams
Marked: 750 and the maker's mark
All stones are intact, no chips or damages.