This is a Thumbnail Size Green Emerald from Gutu, Masvingo, Zimbabwe
Dimensions: 2.5cm (0.9”) x 1.5cm (0.5”)
Weight: 5.2 grams = 26 carats
Emerald is a gemstone and a variety of the mineral beryl colored green by trace amounts of chromium or sometimes vanadium
Chemical formula: Be₃Al₂SiO₆