Lab alexandrite cross pendant and chain necklace in sterling silver

This necklace is from an estate purchase and in excellent pre owned condition showing little to no signs of wear.  Lab created alexandrite gemstones prong set in rhodium or platinum plated over sterling silver. Chain measures about 19 inches with magnetic extension clasp that can be removed to shorten an inch or so. Sterling silver box chain with lobster clasp and magnetic clasp extension. 925 Reasonable offers considered