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`wt = L W , D ,sg("Amethyst"))`

Enter a value for all fields

The ** Weight of a Lozenge Faceted Cut Gem** calculator computes the approximate carat weight of a Lozenge Faceted colored stone (e.g. Amethyst).

**INSTRUCTIONS:** Choose units and enter the following:

- (
**GEM**) Choose type of gem - (
**L**) Length down the face of the gem - (
**W**) Width across the face of the gem - (
**D**) Depth of the gem

**Lozenge 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 carat weight of a Lozenge Faceted Cut Gem formula used in this calculator is:

Wt = L* W * D * sg * 0.00140

where:

- Wt = Carat Weight of the Gem
- L = Length
- W = Width
- D = Depth
- sg = Specific Gravity of Gem

The weight of the gem 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, CLICK HERE.

- Weight Estimate of a Round Faceted Gem
- Weight Estimate of a Pear shaped or Teardrop Gem
- Weight Estimate of a Cabochon Cut Gem
- Weight Estimate of a Cushion Faceted Gem
- Weight Estimate of a Heart Shaped Gem
- Weight Estimate of an Emerald Cut Faceted Gem
- Weight Estimate of a Navette Cut Gem
- Weight Estimate of Long Rectangular Cut Gem
- Weight Estimate of Square Cut Faceted Gem
- Weight Estimate of Marquise Faceted Gem
- Weight Estimate of an Oval Faceted Gem
- Weight Estimate of Lozenge Faceted Cut 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