1) 14K yellow gold ring comprised of 18 round diamonds in a prong setting, sz 6.5, 2) 14K yellow gold ring featuring 8 faceted oval tanzanites, sz 6.25, 3) 10K white gold ring highlighting an oval tanzanite accented by a pair of diamonds, sz 5.25, and 4) 10K yellow gold ring with 5 marquise tanzanite, adorned by 4 diamonds, sz 6.25, 8 grams tw