The market value of topaz varies greatly, ranging from approximately $8 to $749 per carat as of September 2014. Its worth is determined by a number of factors such as weight, color, clarity, cut and shape. A gemologist must appraise the gem to provide an exact estimate.
Topaz is found in over 21 colors, including varying hues of yellow, orange, blue and pink. The clarity of topaz heavily influences its value; over 10 clarity values exist to determine its worth. As of September 2014, the gem is most valuable in 30 carats of light reddish purple, worth approximately $1,393.06. The least valuable incarnation of topaz is 1 carat of colorless topaz, worth $7.77.