NEW White topaz stackable ring set in platinum over sterling silver size 5

This is a brand new ring set without original packaging or tag.  Genuine white topaz round cut gemstones from Golconda, India. Prong set in an authentic 925 sterling silver base that’s plated with platinum. Two rings that stack together measuring a size 5. Total weight is 4.27 grams and 2.75 ctw. Djoy. Made in India. Estimated retail value is $350. Reasonable offers considered