This is a very nice gem quality blue-greenish Aquamarine (a variety of the mineral beryl) silver pendant from Brazil. It is in great condition, good clarity and has natural, untreated.
Those born in March are lucky to have the beautiful Aquamarine as their birthstone (Walter Schumann "Gemstones of the World").
Location: Bahia, Espirito Santo, Brazi
Size: 2.1 x 1.2 x 0.8 Centimeter
Weight: 1.83 Grams

Interesting Fact: Name of gem come from Latin "aqua" (water) and "mare" (sea) a reference to the color.