admin Introduction
Demantoid garnet is a rare green gemstone cherished by both jewelry lovers and gem collectors for its vivid color and diamond-like fire. First discovered in 19th-century Russia, this andradite garnet variety gets its name from the Dutch word for diamond (“demant”) due to its exceptional brilliance and dispersion. In modern times, demantoid remains one of the most valuable garnets, often commanding high prices per carat. This article will cover the current 2026 U.S. market value of demantoid garnets, and help you navigate the demantoid market.
Extraordinary Demantoids
Demantoid garnet is among the most expensive of all garnets, with fine specimens fetching thousands of dollars per carat. Prices have been rising year by year due to high demand and limited supply. Of course, values vary widely based on quality factors and size:
Collectors will pay a premium for extraordinary demantoids. Notably, a 5.5 carat Russian demantoid ring sold at a 2008 Christie’s auction for about $170,876, far exceeding its estimate. That translates to well over $30,000 per carat, underscoring how large, top-quality demantoids command stratospheric prices from investors and connoisseurs. Stones above 5 ct are virtually unheard of in the market and are considered museum-caliber pieces.
Commercial-Grade or Small Stones
Lower-quality or very small demantoids (with pale color or visible flaws) can be relatively affordable, sometimes only a few hundred dollars per carat. For example, clean but less-vivid demantoids without the famed inclusions might sell in the $200–$600 per carat range. Some minor stones (sub-carat or heavily included pieces) even retail for under $100 at online sites, though these are not gem-quality.
Good Quality Gems (~1 carat)
Mid-range demantoids around 0.5–1.5 ct with decent green color and minimal inclusions typically command $500 to $2,000 per carat, according to jewelry industry sources. Cleaner stones with richer color move higher; for instance, fine 1 ct demantoids can easily reach $2,000–$6,000 per carat. A vivid green demantoid around 1 ct may be priced in the low five figures in total.
High-End and Larger Stones
Top-grade demantoids in the 1–3 carat range often cost several thousand dollars per carat. Recent market examples include a 1.63 ct cushion-cut demantoid offered at $10,513 (about $6,450 per carat) and a 2.81 ct radiant-cut gem for $25,992 (about $9,250 per carat). Such stones had excellent color and cut, reflecting current retail prices in the fine gem market. At the very top end, prices may reach $10,000 per carat or more for superb Russian demantoids. In fact, exceptional pieces can go far beyond that: the presence of the coveted “horsetail” inclusion has led some demantoids to fetch an astounding $20,000–$50,000 per carat in rare cases.
Conclusion
Overall, the 2026 market value for demantoid is robust. Fine demantoids are highly sought-after yet hard to come by, so expect to pay several thousand per carat for a good stone, with exponential increases for size and pedigree. The rarity of demantoid (especially in larger sizes) underpins its investment value – many experts note that these gems have few equals in terms of collector desirability and have been appreciating over time.
