Zircon

Carat weight significantly affects value for fine zircon, especially in rare colors such as vivid blue, golden and red. While zircon crystals can be sizeable, larger, clean, well-colored stones above 5–10 carats are less common and command higher per-carat prices.

Color is a primary value factor. Blue zircon—often produced by heat treatment—is one of the most popular varieties, with medium, vibrant blues preferred. Rich golden, honey, red and some green zircons can be highly valued. Pale, heavily brownish or overly dark stones are less desirable.

Faceted zircon is generally expected to be eye-clean or nearly so, especially in blue and colorless stones. Inclusions, strong zoning or cloudiness reduce brilliance and value. Some older zircons may show wear or facet abrasions that also impact desirability.

Cutting zircon requires skill to take advantage of its high refractive index and dispersion. Well-designed brilliant and mixed cuts yield exceptional sparkle and fire, while poor cutting can lead to windowing or overly dark areas. Because zircon is somewhat brittle, cutters must also minimize thin edges and sharp corners.

Zircon is widely distributed geologically and mined in Sri Lanka, Cambodia, Myanmar, Tanzania, Australia and other countries. Most gem zircon is recovered as a by-product of alluvial mining for other gems or heavy minerals.

Demand for zircon is steady but somewhat undercut by confusion with synthetic cubic zirconia. Among connoisseurs, however, natural zircon's brilliance and range of colors are increasingly appreciated. Blue zircon in particular remains popular in both classic and contemporary jewelry designs.

Recent Trends: steady demand from the broader jewelry market, with gradual growth in online and designer channels for well-cut, natural stones.