This product is a pair of 6mm natural top quality AAA tanzanite round loose gemstones. The gemstones are transparent, blue in color, and have excellent cut grade. They are sourced from Tanzania, United Republic of, and are certified upon request. These gemstones are treated with heat and are considered Loupe Clean in terms of clarity grade. Wholesale availability also makes this a convenient option for buyers looking for high-quality tanzanite stones.