This lot of 12 natural blue sapphire gemstones is a great addition to any jewelry collection. The square shape and very good cut grade of these gems make them a versatile choice for any occasion. The transparency of the gems is translucent, and the blue color is a beautiful shade that will catch the eye. The gemstones have been heated, which enhances their natural beauty and adds to their unique charm. These gems are from Africa and were sourced from Nigeria. The item width is 4mm, and the gemstones come in a unit quantity of 1. The country/region of manufacture is Thailand, and the gemstone type is sapphire. This lot is perfect for anyone looking to add some natural beauty to their jewelry collection.