Alexandrite is one of the rarest and most valuable colored gemstones — a fine Russian alexandrite over 3 carats can exceed $100,000 per carat, rivaling the finest rubies and emeralds. Its signature color change from green in daylight to red under incandescent light makes it unlike any other gem. Understanding alexandrite pricing requires evaluating the strength of color change, body color quality, origin, and size — all interacting to create enormous price variation.
Alexandrite Price Chart
| Quality | Price/Carat | Notes |
|---|---|---|
| Commercial (weak change, under 1ct) | $500–$2,000 | Partial color change |
| Good (moderate change, 0.5-1ct) | $2,000–$8,000 | Noticeable change |
| Fine (strong change, 1-3ct) | $8,000–$40,000 | Collector grade |
| Exceptional (vivid change, Russian, 3ct+) | $40,000–$100,000+ | Museum/auction grade |
Color Change: The Value Multiplier
The strength and attractiveness of alexandrite's color change is the single most important price factor. The finest stones show a complete change from vivid bluish-green in daylight to vivid purplish-red under incandescent light. Partial color changers — stones that shift from brownish-green to brownish-red, or show only subtle shifts — sell for a fraction of full-change stones. The 'window' of color change should be dramatic and unambiguous. Use GemstoneAI to capture your alexandrite under different lighting conditions and compare the color-change strength against reference standards.
Origin and Its Price Impact
Russian alexandrites from the Ural Mountains are the most valuable, commanding premiums of 3-10x over other origins for comparable quality. Russian stones were the first discovered (1830) and are considered the benchmark for color change. Brazilian alexandrites from Hematita can rival Russian stones in quality and represent excellent value. Sri Lankan alexandrites tend toward olive-green to brownish-red changes. Indian alexandrites from Andhra Pradesh offer more affordable entry points. African sources (Tanzania, Madagascar) produce material of varying quality.
- Russian (Urals): $30,000–$100,000+/ct for fine quality — the ultimate collector's stone
- Brazilian (Hematita): $10,000–$50,000/ct for fine quality — best value at top tier
- Sri Lankan: $3,000–$15,000/ct for good change — lighter body colors
- Indian: $1,000–$8,000/ct for good change — more accessible
- African: $500–$5,000/ct — variable quality and color change
Size Rarity and Pricing
Fine alexandrite over 1 carat is rare; over 3 carats is extremely rare; and over 5 carats is museum-quality. This extreme rarity means prices escalate more steeply with size than almost any other gemstone. A 0.5ct stone with good change might sell for $3,000-$5,000/ct, while a 3ct stone of comparable quality could reach $30,000-$70,000/ct. At auction, exceptional alexandrites over 5 carats have sold for over $100,000 per carat. For collectors, even small stones with strong color change represent a worthwhile acquisition given alexandrite's extreme rarity.
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