The 15 most expensive gemstones

1. Painite — $50,000 to $60,000 per carat

Painite (calcium zirconium borate) was the world's rarest mineral for decades, with fewer than 3 known crystals until the 2000s. Myanmar deposits have produced more material since, but facetable quality remains extremely scarce. Color: dark red to brownish red.

2. Blue diamond — $3,000,000+ per carat at auction

Natural blue diamonds owe their color to boron inclusions during formation. Fancy vivid blue is the rarest and most valuable color in the diamond spectrum. Fine examples have sold for over $3 million per carat at major auction houses.

M
3

Musgravite — $35,000 to $60,000 per carat

Musgravite is a beryllium magnesium aluminum oxide first found in Musgrave, Australia in 1967. Fewer than 20 facetable specimens were known by 2005. Color ranges from gray-green to grayish purple. It is closely related to taaffeite and equally rare.
J
4

Jadeite jade — $20,000 to $30,000+ per carat (Imperial grade)

Jadeite is the rarer, harder, and more valuable of the 2 jade minerals. Imperial jade — vivid emerald green, semi-transparent — commands the highest prices. Myanmar is the primary source. Nephrite jade is far more common and affordable.
R
5

Red beryl — $10,000 to $15,000 per carat

Red beryl (also called bixbite) grows in the Wah Wah Mountains of Utah and very few other locations. Its raspberry-red color comes from manganese. Most crystals are under 1 carat; stones over 3 carats are exhibition pieces.

6. Alexandrite — $15,000 to $70,000 per carat (fine quality)

Alexandrite is a chrysoberyl variety that shifts color dramatically between daylight (green) and incandescent light (red-purple). Fine Russian material with strong color change commands the highest prices. Lab-grown is readily available and chemically identical.

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7

Taaffeite — $35,000 to $50,000 per carat

Taaffeite is a beryllium magnesium aluminum oxide discovered in 1945 — one of the few minerals first found as a faceted stone, not a raw specimen. Color ranges from colorless to mauve to pale red. Sri Lanka and Tanzania are the main sources.
B
8

Benitoite — $3,000 to $5,000 per carat

Benitoite is California's state gem and is found commercially in only 1 location: the Benitoite Gem Mine in San Benito County. Its vivid blue color and strong dispersion resemble sapphire, but its fluorescence under UV is unique. Stones over 1 carat are rare.
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9

Kashmir sapphire — $50,000 to $200,000 per carat

Kashmir sapphire is not a different mineral — it is the same corundum as other sapphires. Its premium comes from origin: the Zanskar Range deposit produced an exceptional velvety blue for roughly 20 years before depletion. Proven Kashmir origin by lab adds 3x to 10x premium.
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10

Pigeon's blood ruby — $1,000,000+ per carat at auction

Pigeon's blood is a color grade applied to the finest Burmese rubies: pure red with a hint of blue fluorescence and no brown. A certified unheated pigeon's blood ruby over 3 carats is one of the rarest colored stone acquisitions available. Most rubies on the market are heated.
P
11

Padparadscha sapphire — $30,000 to $50,000 per carat

Padparadscha is a pink-orange sapphire from Sri Lanka. The name comes from the Sinhalese word for lotus blossom. The color must be simultaneously pink and orange in equal balance — too pink is a pink sapphire, too orange is an orange sapphire. Sri Lankan origin commands a premium.
P
12

Paraiba tourmaline — $10,000 to $60,000 per carat

Paraiba tourmaline is a copper-bearing elbaite from Paraiba, Brazil (and later Mozambique and Nigeria). Its neon blue-green is unlike any other gem color. Brazilian material commands 3x to 5x the price of African material at equivalent quality.
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13

Demantoid garnet — $2,000 to $20,000 per carat

Demantoid is a green andradite garnet. Russian demantoid from the Ural Mountains contains distinctive horsetail inclusions (chrysotile fibers radiating from a central point) that are considered proof of Russian origin and add to value rather than diminishing it.
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14

Grandidierite — $20,000 to $50,000 per carat

Grandidierite is a blue-green mineral found primarily in Madagascar. First described in 1902, facetable quality was not found until the 1990s. Its trichroism (blue-green, colorless, and dark green in different axes) is optically distinctive.
B
15

Black opal — $2,000 to $15,000 per carat

Black opal from Lightning Ridge, Australia shows play-of-color against a dark body tone. Red-on-black flash is the rarest and most valued pattern. Fine specimens over 5 carats with bright red flash have sold above $15,000 per carat.

What drives gemstone price?

  • Rarity of species — how many carats exist in total facetable supply
  • Color quality — saturation, hue, tone, and absence of modifying colors
  • Optical phenomena — color change, play-of-color, chatoyancy, asterism
  • Origin — Kashmir sapphire and Burmese ruby carry origin premiums of 3x to 10x
  • Treatment status — unheated, untreated gems command multiples over heated equivalents
  • Size — large stones of rare species are exponentially rarer than small ones
  • Certification — lab-certified origin, treatment status, and color grade all affect price

Frequently asked questions

What is the single most expensive gemstone?
By per-carat auction record, blue diamonds hold the highest prices. However, painite commands the highest dealer ask price for a consistently available species. The question depends on grade, size, and whether auction records or retail prices are the benchmark.
Yes, with budget caveats. Commercial-grade alexandrite, demantoid garnet, and black opal are available in the $500 to $5,000 range per stone. Painite, grandidierite, and musgravite are effectively collector-only at accessible quality levels.
Lab-grown alexandrite and ruby are widely available and chemically identical to natural. Lab-grown blue diamond exists. Lab-grown painite, musgravite, and taaffeite are not commercially produced.
Yes. Gemstone markets fluctuate with new deposits, treatment disclosures, economic conditions, and fashion cycles. The price ranges here reflect 2025 dealer and auction data and are not guarantees.
Any stone over $1,000 should have a report from an independent gemological laboratory confirming species, treatment status, and origin if origin-premium pricing is involved. Verify the report directly with the issuing lab.