Gemological Calculators comprises a selection of 3 different calculators that will simplify calculations which have given you headaches so far. Complex calculations, such as Rule of Thumb Pricing, Carat Weight and Gemstone Carat Weight will be handled easily with this app. > Rule of Thumb Pricing > Carat Weight > Gemstone Carat Weight Features: - Formula and description for each calculator - Copy / Paste params and results - Clean, simple and easy to use. If you have any question please contact us: veghferencrobert@yahoo.com All information contained in and produced by the Gemological Calculators app is provided for educational purposes only.