Starting with diamonds, type in a carat weight. Scroll to the shape, color grade, clarity grade, cut grade, and fluorescence. At the top will display the price per carat and the stone price. The calculator will deduct for cut grade and flourescence depending on the selection. By clicking on the table, the entire price table from the GemGuide will appear for that weight.
For colored gemstones, select a gem such as aquamarine. You now have the option to select color notation for hue, tone, and saturation from Gemworld’s World of Color or you can enter the color notation from any other system (only the World of Color will have the ability to grade based on internal grading charts for your selection). Enter the gemstone weight. The next tab is for selecting the clarity grade by judging the inclusions, texture, and zoning. Next is the brilliance where users can select the percent of brilliance, windowing, and extinction.
The next tab is for proportions. Here a quick grab of acceptable or unacceptable will be chosen for the crown height, pavilion depth, bulge, girdle, and table. Choose the grade for symmetry from Excellent down to Poor. And finally the same for polish.
What is so unique about this gem calculator is that when you start with the color description, a color grade is shown at the top of screen and a price associated with the grade. You can overwrite the grade which will also change the price. As you then continue to select the other attributes of clarity and cut, the grade will automatically adjust taking appropriate deductions. When finished, an estimated price per carat and per stone appears for your use plus you can also view the entire price grid to see where your stone might have fit in on our pricing charts.
The app also allows for prices to show on the screen at wholesale or retail. The user can set the markup or use the default markups provided in the App when downloaded. The user can toggle back and forth between wholesale and retail. For users in other countries all pricing can be viewed in different currencies. The currency conversions are done automatically, changing daily based on prevailing exchange rates.