algt colored stone identification report identification species .......................................................................................................... natural topaz variety .................................................................................................................. blue topaz description shape & cutting style ......................................................................... oval, mixed cut measurements .................................................................. 23.51 x 16.51 x 11.18 mm carat weight ................................................................................................... 33.78 carat color ....................................................................................................................... deep blue transparency .................................................................................................. transparent additional grading characteristics trade color name ....................................................................................... london blue comments blue topaz is commonly enhanced by irradiation and/or heating to improve its color. there is currently no scientific method available to determine whether this gemstone has been enhanced or not. 19 july, 2025 40694002