Silver, Gold, Amethyst, Diamond & Pearl Necklace

antique style, multi-strand pearls ranging from approx. 3 to 4mm each, one oval fancy cut amethyst approx. 16.5 x 12.5mm, eight cushion fancy cut amethysts approx. 8 x 6mm each, approx. 264 round brilliant diamonds estimated total weight 4.5cts., champagne color, SI, tested sterling silver and 18kt. yellow gold, stamped "750", tapers from approx. 1/2 to 1 in wide, 16 in. lg., 57.3 gramsProvenance: Private Collection, Tennessee
Condition Report: visible solder on some mountings, wear and scratches consistent with useÿ