Calculations and Formulas for Gemstones
Carat Weight.. Given the cut and dimensions of a stone, estimate its weight in Carats. Optimized on over 1,000 individual gemstones. A full 300 stones to choose from. All measurements in mm and Carats.
Stone Identification . Given the dimensions and the weight, estimate the specific gravity of your stone and guess at its identity. All measurements in mm and Carats.
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Precious Metal Value Calculator
. Evaluates the current on-line price of all carat golds, silver,
platinum, and palladium. Uses the current on-line price for a
variety of currencies.
|Wax Calculator for Castings. You have a wax, but need to know the weight of the cast gold piece. And its value. Or you have a brass or silver model. This page evaluates the current on-line price of all carat golds, silver, platinum, and palladium. Uses the current on-line price for a variety of currencies.
|Units Calculator. Convert weights between grams, carats, pennyweights, and ounces.
|General Units Calculators. Convert all sorts of units. There are several great ones on the Web, here are two.
|Mass/Weight Conversions. Did you ever hear of a denarium or a duella or perhaps a zolotnik or a berkovets? ku ping or doite? Know the difference between a long hundredweight and a short hundredweight? Here is an incredibly extensive mass conversion site. All units are conserved, so you need have no worry that these are Weapons of Mass Destruction. How about a mite or a koku?
|Here, courtesy of Sarah Glassman, is a bunch of online conversions, including temperature and time zone. Very helpful for those of us traveling soon.
|Next up, an incredibly thorough set of Home Calculators (mortagage ReFi's, home budgets, even a House Flipping Renovation calculator (Remember that, so popular in the 1997-2007 decade?), courtesy of the well-earned Student of the Week Award of Mrs. Anne Hughes at the Monument Charter School in DC.
This page was down for a few years, but now it is back up, better than ever! For example, Stone Identification now makes guesses at actual identity (eg, Diamond, Quartz), not just specific gravity.
Another great list: Sites That Do the Work For You
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