3.52 ct Dazzling Oval (9.71 x 8.34 mm) Green Demantoid Gemstone

Lighting
Demantoid garnet generally looks best under daylight. Incandescent light makes it appear slightly more yellowish green. Because of its high dispersion, demantoid looks great in the same type of lighting as diamond, i.e., multi-point (as opposed to diffuse) lighting.

Clarity
In terms of clarity, demantoid is relatively clean. Thus when buying one should expect eye-clean or near-eye-clean stones. Demantoids often contain radiating needle inclusions that are termed “horsetails.”

Cut
In the market, demantoids are found mainly as round brilliant or cushion cuts. Cabochon-cut demantoids are not often seen.

Prices
Demantoid is among the most expensive of all garnets, with prices similar to those fetched by fine tsavorite (the other green garnet). But like all gem materials, low-quality (i.e., non-gem quality) pieces may be available for a few dollars per carat. Such stones are generally not clean enough to facet. Prices for demantoid vary greatly according to size and quality. At the top retail end, they may reach as much as US$10,000 per carat.

Stone Sizes
Demantoid is rare in faceted stones above 2 cts. Fine demantoids above 5 carats can be considered world-class pieces. Most stones tend to be less than 1 ct.

Sources
The original locality for demantoid was in Russia’s Ural Mountains.