This pretty bracelet was gifted to me as a teen in the 1980s, purchased off the original Home Shopping Club (1982–1985), which was a TV channel "Where America Flips for Bargains" (aka a broadcasting bazaar, it was a new innovation THEN)! I know nothing about the 20 amethysts carat-wise (s.g. formula for rectangle shape well beyond me!). 14K stamp shown, photos 6-7 w/hallmark that's either "M" or "W". Measurements/weight(6.54g), photos 8-11. Box clasp photos 12-13. Bottom/side views photos 14-15.