The Weight of a Marquise Faceted Gem calculator computes the approximate carat weight of an Marquise Faceted colored stone (e.g. Diamond, Ruby or Emerald)
INSTRUCTIONS: Choose units and enter the following:
Marquise Faceted Cut Gem Weight (Wt): The calculator returns the weight in carats. However this can be automatically converted to compatible units via the pull-down menu.
The length to width ratio that defines a marquise faceted cut is between 1.5 and 3.0.
The CLICK HERE.is a function the volume and the specific gravity. The volume is estimated base on the gem's shape and dimensions. The specific gravity is dictated by the type of gem. For the specific gravity of different gem,
The gems supported in these calculators include the following:
Agate, Alexandrite, Almandite garnet, Amethyst, Andalusite, Aquamarine, Beryl, Bloodstone, Blue Topaz, Carnelian, Cats eye, Chalcedony, Chrysoberyl, Citrine, Corundum, Demantoid Garnet, Diamond, Emerald, Golden beryl, Green beryl, Kunzite, Lapis Lazuli, Morganite, Onyx, Opal, Precious topaz, Pyrope garnet, Quartz, Rhodolite garnet, Rose Quartz, Ruby, Sapphire, Sardonyx, Smokey quartz, Spessartite garnet, Spinel, Tanzanite, Topaz, Tourmaline, Tsavorite garnet, Turquoise, Yellow topaz, and Zircon
The carat weight equations and data used in vCalc's jewelry library and calculator were reviewed by a certified gemologist. The equations are based on industry recognized formulas and data. The table below shows a comparison of computations between vCalc and an industry accepted application (Quantum Leap).
The length, width and depth are in millimeters (mm), and the Quantum Leap and vCalc measurements are in carats (cwt).
The largest variance, an oval faceted alexandrite, which can be seen in the last row above, has been double checked against several source equations which tend to support vCalc's accuracy.