35 Most Valuable Gemstones Ranked by Price: Least to Most Expensive

When people think of expensive gemstones, the “Big Four”—diamonds, emeralds, rubies and sapphires—often come to mind. Yet there are many precious stones rarer and, in some cases, far more valuable than those household names.

Several of the world’s most valuable gems have been discovered only in recent decades. Minerals like pezzottaite (discovered in 2002) and musgravite (first gem-quality find in 1993) are relatively new to the market but have quickly become sought after. Their high prices reflect extreme scarcity, limited supply from single or few locations, and strong collector demand.

Other gems, such as aquamarine, have been prized since ancient times, while unusual varieties like black diamonds have seen price increases driven in part by celebrity fashion. Below is a refined, SEO-optimized overview of 35 of the most valuable gemstones in the world, ranked roughly by price per carat. The list includes familiar classics as well as rare, lesser-known stones.

35. Amblygonite

Price per carat: $51–$108

Highlights: Typically light straw-colored, amblygonite can also appear in yellow, green, blue-green and lilac. It is relatively soft and best suited to collector pieces rather than daily-wear jewelry. Large, faceted examples are rare and prized by collectors.

34. Enstatite

Price per carat: $59–$81

Highlights: A common silicate mineral, enstatite varies from clear to gray, yellow, brown or green. Green varieties from South Africa or Myanmar are rarer and command higher prices. With a Mohs hardness of about 5–6, enstatite is more often a collector’s gem than a durable daily-wear stone.

33. Axinite

Price per carat: $59–$540

Highlights: A borosilicate mineral, axinite occurs in gray, brown and purple tones. It is hard enough to be faceted and used in jewelry but can be brittle under impact. Its rarity and attractive colors make gem-quality specimens valuable.

32. Kornerupine

Price per carat: $64–$122

Highlights: Also known as prismatine, kornerupine is a borosilicate first described in 1884. Bluish-green and emerald-green stones that are clear and transparent are the most prized and rare.

31. Hiddenite

Average price: $100 per carat (varies widely)

Highlights: A green variety of spodumene, hiddenite ranges from pale to deep emerald green. The deepest greens and high-clarity custom cuts are the most valuable, though the stone can be challenging to cut without fracture.

30. Pearl

Price per pearl: $300–$1,500 (single pearls vary; strands can fetch six-figure prices)

Highlights: Pearls are organic gems composed of calcium carbonate produced by mollusks. South Sea pearls are especially prized—long-standing symbols of elegance and family heirlooms, sometimes reaching very high values when size, luster and uniformity are exceptional.

29. Red Coral

Price per carat equivalent: Approximately $320 for fine-quality pieces

Highlights: True red coral—particularly Japanese “ox blood” coral—is increasingly rare due to overharvesting. Valued for its saturated color and carved forms, red coral has long been used in jewelry and decorative objects.

28. Tanzanite

Price per carat: $600–$1,000

Highlights: Found only in the foothills of Mount Kilimanjaro, tanzanite is a variety of zoisite that is typically heat-treated to bring out its blue-violet color. Known deposits are limited and could be exhausted within decades, contributing to its scarcity and value.

27. Aquamarine

Price per carat: Around $1,000 for fine-quality stones

Highlights: A blue to green-blue beryl, aquamarine has been prized since antiquity. Darker, intensely saturated blue examples—especially those from Brazil—are the most valuable.

26. Sapphire

Price per carat: $1,200–$2,000 (top specimens much higher)

Highlights: Corundum varieties, sapphires come in many colors; vivid blue and rare colors fetch the highest prices. The Blue Belle of Asia (392.52 carats) is one of the most famous and valuable sapphires ever sold.

25. Spessartine Garnet

Price per carat: $1,500–$3,000

Highlights: Known for vivid orange to reddish-orange hues, top “mandarin” spessartine garnets are rare and highly sought. Gem-quality stones of larger size are uncommon, which drives up value.

23. Jeremejevite (tie)

Price per carat: Around $2,000

Highlights: A rare aluminum borate mineral, jeremejevite appears in blue, yellow, brown and colorless forms. Gem-quality stones over 1 carat are uncommon; the largest cut specimen known weighs 45.61 carats.

23. Pezzottaite (tie)

Price per carat: About $2,000

Highlights: Discovered in 2002 and found in only a few localities, pezzottaite is a cesium-beryllium-lithium silicate prized for its raspberry-pink to orange-pink tones. Limited supply and strong demand push prices upward.

22. Fire Opal

Price per carat: Approximately $2,300 for fine specimens

Highlights: Translucent and warm-hued, fire opals show a play of color and range in tones from yellow to red. Gem-quality examples are rare; the Fire of Australia is one of the most famous and valuable uncut opals.

21. Poudretteite

Price per carat: Around $3,000

Highlights: First found as small crystals in Quebec, poudretteite is an extremely rare borosilicate. Gem-quality, transparent stones over 1 carat are very uncommon; the Smithsonian holds a notable 9.41-carat example.

20. Black Diamond

Price per carat: $3,000–$5,000

Highlights: Opaque fancy-color diamonds colored by graphite inclusions, natural black diamonds (carbonados) are rare and increasingly fashionable. Treated stones are cheaper than naturally black diamonds.

19. Demantoid Garnet

Price per carat: Approximately $3,300

Highlights: A green andradite garnet discovered in Russia’s Urals, demantoid is prized for intense brilliance—often described as “diamond-like.” High-quality stones are small and rare, typically used in antique and collectible jewelry.

18. Black Opal

Price per carat: About $3,500 for top examples

Highlights: Black opals have dark backgrounds that make play-of-color spectacular. True black opals are very rare and primarily sourced in Australia and Nevada; museum-quality specimens can command seven-figure prices.

17. Benitoite

Price per carat: Around $4,000

Highlights: A blue to blue-purple barium titanium silicate, benitoite is California’s state gem. Deposits are extremely limited—large facetable stones are rare—so collector-quality pieces are valuable.

16. Ruby

Price per carat: Starting around $4,500 for fine gem-quality; exceptional stones can reach $1 million+ per carat

Highlights: A red variety of corundum colored by chromium, rubies—especially those with the famed “pigeon’s blood” hue—have a long history of royal ownership. Record sales like the Sunrise Ruby demonstrate how dramatically values can escalate for top examples.

15. Musgravite

Price per carat: Around $6,000 (top stones can fetch much more)

Highlights: A member of the taaffeite family, musgravite is exceptionally rare. Gem-quality musgravite is scarce and commands high prices; exceptional pieces have sold for tens of thousands per carat.

14. Padparadscha Sapphire

Price per carat: Around $8,000 for the finest examples

Highlights: The padparadscha is a salmon pink to pink-orange sapphire considered the rarest sapphire variety. Only high-quality stones with the ideal pink-orange balance command premium prices at auction.

13. Red Beryl (Bixbite)

Price per carat: Around $10,000

Highlights: Exceptionally rare and primarily sourced in Utah, gem-quality red beryl (bixbite) is far less common than ruby or high-quality diamonds. Large, fine-quality stones are extremely scarce and highly valued.

12. Paraiba Tourmaline

Price per carat: $10,000–$20,000

Highlights: Discovered in Paraíba, Brazil in 1989, Paraíba tourmalines are famous for their vivid, “electric” blue to mint-green colors, often caused by copper traces. The finest Brazilian stones fetch the highest prices; limited supply keeps demand strong.

11. Alexandrite

Price per carat: Around $12,000

Highlights: Famed for dramatic color-change (green in daylight, red under incandescent light), alexandrite was originally sourced in Russia but is now also found in East Africa, Brazil and Sri Lanka. High-quality stones are rare and command significant premiums.

10. Taaffeite

Price per carat: Up to $15,000 for gem-quality stones

Highlights: One of the rarest gems, taaffeite was first identified in 1945. It ranges from colorless to violet and can be mistaken for spinel. Very few specimens exist in the gem trade, and top-quality material is highly prized.

7. Serendibite (tie)

Price per carat: Around $18,000

Highlights: An exceptionally rare boron-bearing silicate, serendibite is typically dark blue-green. Historically limited to Sri Lanka, more recent finds have been reported from Myanmar; gem-quality pieces are extremely rare and valuable.

7. Clear Diamond (tie)

Price per carat: About $18,000 and up for top-quality white diamonds

Highlights: Clear diamonds are graded by the 4 Cs—cut, color, clarity and carat—and demand for engagement and bridal jewelry keeps prices high for the finest stones. Historic examples and famous large stones reach tens to hundreds of millions in value.

7. Emerald (tie)

Price per carat: Around $18,000 for top-quality stones

Highlights: The green variety of beryl, emeralds gain value from deep color saturation, size and clarity. Historically treasured by royalty, the finest Colombian emeralds routinely command premium prices.

5. Grandidierite (tie)

Price per carat: Around $20,000

Highlights: Extremely rare and often pleochroic (showing different colors from different angles), grandidierite is sought after by collectors. Only a small fraction of occurrences yield gem-quality material.

5. Jadeite (tie)

Price per carat: Around $20,000 for the finest imperial-quality material

Highlights: The rarest variety of jade, highly prized in East Asian markets. Top-quality imperial jadeite with vivid, translucent green color and even texture has fetched multi-million-dollar prices at auction.

4. Painite

Price per carat: $50,000–$60,000

Highlights: Once known from only a handful of specimens, painite is among the rarest minerals on Earth. Facetable stones are exceedingly scarce, and the highest-quality examples command very high prices.

3. Blue Diamond

Price per carat: $52,000–$300,000 and up

Highlights: Fancy blue diamonds derive their color from trace boron. Extremely rare and mined in very limited locations, top vivid blue diamonds have set auction records and can reach tens of millions of dollars.

2. Pink Diamond

Price per carat: Up to $700,000 and higher for the rarest hues

Highlights: Pink diamonds represent a vanishingly small fraction of diamond production. Intense, pure pinks, especially large, flawless stones such as the Pink Star, have achieved record-breaking auction results.

1. Red Diamond

Price per carat: Around $1 million per carat for the rarest examples

Highlights: Red diamonds are the rarest and most expensive class of fancy-color diamond. Almost all known red diamonds weigh less than 1 carat; the Moussaieff Red (5.11 carats) is among the largest and most valuable, with mult-million-dollar valuation.

These gemstones span a wide range of origins, colors and market niches—from timeless classics used in fine jewelry to modern discoveries prized by collectors. Factors that drive value across this list include rarity, color intensity, clarity, carat weight, provenance and collector demand. Whether sought for investment, heritage or beauty, the world’s rarest gems continue to fascinate and command extraordinary prices.