Sapphire
Kashmir, Myanmar, Sri Lanka · 3364 specimens · 1.7ct avg
Sapphire is the non-red gem variety of corundum (Al₂O₃), occurring in a wide range of colors including blue, pink, yellow, green, purple, colorless and parti-color. Blue sapphire is the best known and most commercially important. With Mohs hardness 9 and excellent toughness, sapphire is extremely durable and ideal for all jewelry types.
Price History
Quality Tiers
Listings
Specimen Data
Value Drivers
Carat weight strongly influences value, especially for fine blue sapphires. High-quality stones above 2–3 carats are scarce, and prices per carat increase notably with size. Large, fine sapphires above 5 carats with top color and clarity are rare and can achieve very high prices at auction.
Color is the primary value factor. The finest blue sapphires display a vivid, medium to medium-deep royal blue with strong saturation and no significant gray or green modifiers. Overly dark, inky stones or very light, washed-out blues are less valuable. Fancy sapphires (pink, yellow, etc.) have their own ideal color ranges and market dynamics.
Sapphires typically contain some inclusions. Eye-clean stones in medium sizes are still relatively rare and more valuable. Fine silk (rutile needles) can improve appearance by softening color and can also create star effects in cabochons, but heavy inclusions that reduce transparency or create visible flaws lower value.
Cut quality is critical for sapphire, affecting both brilliance and apparent color. Most stones are cut in ovals, cushions and mixed cuts that manage color zoning and pleochroism. Well-cut sapphires show bright internal reflections and an even face-up color. Poorly cut stones may be too shallow, windowed or overly deep and dark.
Market Dynamics
Sapphire is mined in many countries, including Sri Lanka, Myanmar, Thailand, Madagascar, Tanzania, Australia and others. Deposits vary in output and color characteristics; for example, Kashmir sapphires are famed for their velvety blue but are essentially depleted, while Madagascar and East African sources are important modern suppliers.
Demand for sapphire is consistently strong in both classic and contemporary jewelry, with blue sapphire occupying a top position in the colored stone market. Sapphire is widely used in engagement rings and high jewelry as a primary colored gemstone alongside ruby and emerald.
Recent Trends: strong demand and stable to rising prices for fine blue sapphires, especially with certified origin (e.g., Kashmir, Burma, Sri Lanka), and growing interest in fancy-color sapphires.
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Insights
Heat treatment to improve color and clarity is extremely common and generally accepted when properly disclosed; unheated sapphires with top color carry significant premiums.
More invasive treatments like diffusion or beryllium enhancement can dramatically change color but are less valued and must be fully disclosed.
Star sapphires displaying asterism are valued for sharp, centered stars, good translucency and attractive bodycolor, with large, fine examples commanding high prices.
Laboratory certification of origin (e.g., Kashmir, Burma, Ceylon) is often important in the high-end market and can significantly impact value.
Sapphire's durability also makes it a popular material for watch crystals and technical applications, though those typically use synthetic sapphire.
Synthetic sapphire has been available for over a century; careful testing is required to separate natural from synthetic stones in the market.
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