algt colored stone identification report identification species ......................................................................................................... natural zoisite variety ..................................................................................................................... tanzanite description shape & cutting style ..................................................................... round, mixed cut total carat weight .......................................................................................... 2.98 carat color ..................................................................................... light blue to purplish blue transparency .................................................................................................. transparent additional grading characteristics origin ......................................................................................................................... tanzania origin determination is an expert opinion based on microscopic examination, spectroscopic features and chemical trace element analysis. comments total 11 stones. average carat weight: 0.27 ct. tanzanite is commonly heated at low temperature to improve its color. there is currently no scientific method available to determine whether this gemstone has been enhanced or not. 19 november, 2025 71238496