Diamond History: Statistics, Production, Pricing, and Trends

Diamonds, one of the oldest minerals on this planet, were formed around 1-3 billion years ago deep in Earth’s mantle, before volcanic eruptions brought them to the surface. 

The first diamonds were documented in ancient India as early as the 4th century BCE. There, alluvial mining along riverbeds produced prized stones for trade across Asia and Europe. 

Today, roughly 105-130 million carats of rough diamonds are produced annually worldwide, with Russia, Botswana, and other African nations dominating output.

In this article, we’ll discuss diamond’s history, key stats, and industry trends. 

Currently, the global rough diamond reserves are estimated at around 1.7 billion carats. And the diamond market has become a multibillion-dollar global industry, valued at over $100 billion annually.

In this article, we will explore diamonds’ geological origins, historic trade evolution, modern production and pricing trends, and the cultural and market shifts reshaping the industry today.

The following infographic visualizes the key statistics you need to know about diamonds and their history! 

The shiny diamonds we now find in the market, you might wonder how old they actually are. 

Scientific dating shows that most natural diamonds were formed between 1.0 and 3.5 billion years ago. It was during the Archean and Proterozoic eons. 

The oldest known diamonds have been dated at roughly 3.5 billion years old. This makesthem older than most continental crust.

Diamonds form deep within Earth’s mantle under extreme temperature and pressure conditions, typically at depths of more than about 120 kilometers. 

However, some may originate deeper or shallower depending on local geology.

Roughly 90-95% of known natural diamonds crystallized during the Archean eon, which was 4-2.5 billion years ago. 

Gem-quality diamonds are very rare compared to total diamond production. 

Only about 20% of mined diamonds meet gem-quality standards suitable for use in jewelry. 

The remaining 80% are categorized as industrial diamonds, used in cutting, drilling, abrasives, and other technical applications due to their hardness.

Global rough diamond reserves are estimated at around 1.7 billion carats. A portion of that stockpile has already been mined.

Only about one in five rough diamonds recovered from the earth has the color, clarity, cut potential, and size desirable for the jewelry market.

Since their discovery back in ancient times, diamonds have been a product of massive interest in trade. 

Diamonds were first documented in ancient India as early as the 4th century BCE. Back then, they were found in alluvial deposits along rivers in what is now Central and Eastern India. 

These early discoveries became the world’s first known diamond mines, which later laid the foundation for the global diamond trade.

The famed Golconda region (in present-day Telangana/Andhra Pradesh) emerged as the most important diamond-producing area by the medieval period. 

Golconda’s alluvial diamonds, including legendary stones like the Koh-i-Noor and Hope Diamond, dominated global gem markets for centuries due to their exceptional size and clarity.

For more than a millennium, from roughly 800 CE through the 1700s, India was the primary source of gem-quality diamonds in the world. 

Indian diamonds were transported by land and sea along trade routes connecting South Asia with the Middle East and Europe. Arab, Persian, and Venetian merchants mostly carried the diamonds westward. 

By the 15th century, Lisbon became a major European entry point for diamonds.

Precise pre-modern production quantities are not reliable estimates. However, historical records and trade accounts indicate hundreds of thousands of carats of Indian diamonds supplied European nobility and royal courts from the Middle Ages into the early modern period.

India’s long monopoly ended in the early 1700s when diamond deposits were discovered in Brazil, notably in Minas Gerais. 

The discovery quickly reshaped global production, with output from Brazil estimated in the millions of carats by mid-century. 

By the late 18th century, Brazil had become the world’s largest diamond producer, which shifted both production volumes and trade flows significantly. This helped lower prices and broaden access to diamonds outside of royal and aristocratic circles.

Although pre-19th-century statistics are imprecise, historians generally agree that:

• India produced the vast majority of high-quality diamonds from the early era of trade until around 1720

• Brazil’s discoveries (from 1725 onward) produced perceived surges in output and fed rising European demand

These early trade patterns set the stage for later production booms in South Africa (late 1800s). Eventually, global industrial mining in the 20th and 21st centuries.

Diamond production saw a significant surge in the 19th century. At that time, South Africa was discovered as a diamond mining hub. 

The discovery of diamonds near Kimberley, South Africa, in 1866 sparked the first major modern diamond rush. 

This discovery fundamentally shifted global production. Before that, most gem-quality diamonds came from India and Brazil, but Kimberley changed everything.

South African output grew almost exponentially. Annual production rose from tens of thousands of carats in the 1860s to millions of carats by the 1880s.

By the 1890s, South Africa was producing over 90% of the world’s diamond supply, effectively reshaping global trade and pricing.

Founded in 1888, De Beers Consolidated Mines Ltd. quickly became synonymous with the diamond industry by consolidating mines and controlling supply.

At its peak in the 20th century, De Beers controlled approximately 80–90 % of the world’s rough diamond supply for several decades, especially from the 1920s to the 1980s.

De Beers’ dominant share (80-90%) throughout much of the 20th century exemplifies a near-monopoly in global markets. Also, diamond output grew steadily throughout the 1900s, reaching hundreds of millions of carats per decade by century’s end.

Inflation-adjusted pricing shows long-term increases influenced as much by marketing and demand as by supply. 

The diamond industry saw massive growth during the 20th century. 

The following bar graph shows the growth of diamond production by decade. 

The 20th century saw the diamond industry evolve from De Beers' dominance to broader global mining, with major players shifting over time.

Over the century, production increased as new deposits were developed, particularly in Botswana (1960s onward) and Australia’s Argyle mine (1980s), while South Africa gradually ceded its dominance.

Diamond prices have not tracked linearly with supply. Pricing has been influenced by marketing, geopolitics, and macroeconomic conditions.

• WWII (1939–1945): Interruptions in supply and export controls temporarily tightened markets.

• 1960s–1980s: Rising Western demand and marketing elevated price floors.

• 1990s onward: New producers (Botswana, Russia) and synthetic alternatives introduced pricing pressures in certain segments.

Diamonds became dominant in engagement rings after the 1947 marketing campaigns. Today, 80-90% of engagement rings contain diamonds.

Global production remains steady at around 115–125 million carats annually, with Russia and Botswana leading. The total diamond jewelry industry remains a $100B+ global market

In the present day, if you’re planning to propose to your loved one to be yours forever, the first thing that you need to worry about is getting a beautiful ring. 

Diamonds have been dominating the engagement ring market for a long time now. The first usage of diamonds on an engagement ring can be traced back to 1477. 

The first recorded diamond engagement ring was given in 1477, when Archduke Maximilian of Austria proposed to Mary of Burgundy with a diamond ring. This was the earliest documented use of diamonds in proposals.

Although the earliest instance of diamonds being used in proposals is from the 15th century, diamonds were not always standard in proposals. 

Adoption rose sharply in the 20th century-

The turning point was the 1947 campaign by De Beers, “A Diamond Is Forever”. Through this, the company managed to link diamonds with marriage and drive mass adoption.

• U.S. average spending (2023–2024): $5,500–$6,000 per engagement ring (The Knot Real Weddings Study)

• UK average: £2,000–£3,000

• Global trend: Spending varies widely, but diamonds remain the dominant choice.

• 80–85% of engaged couples globally choose a diamond center stone (natural or lab-grown)

• Trend shift: Lab-grown diamonds now account for 15–20% of engagement ring center stones in the U.S. (2023–2024 retail data).

Let’s have a look at which country produces diamonds in what volumes. 

• Russia – Largest by volume (via Alrosa mines in Yakutia)

• Botswana – Major high-value producer (Jwaneng, Orapa)

• Canada – Significant Arctic production (Ekati, Diavik)

• DR Congo – Large volume, mostly industrial-grade

• Australia – Historically a major producer (Argyle Mine, closed 2020; once supplied around 90% of global pink diamonds)

Industry size (including retail jewelry): The broader diamond jewelry market exceeds $90-100 billion annually worldwide.

In the 21st century, lab-grown diamonds have started entering the global diamond market, apart from the natural ones. 

Over the last decade, the market share of lab-grown diamonds has significantly increased. Have a look at the following infographic:

Lab-grown discount (2023–2024): Typically 60–80% cheaper than comparable natural diamonds at retail.

In 2016, lab-grown diamonds were ~30–40% cheaper than natural equivalents.

Meanwhile, average wholesale lab-grown prices fell 30–40% between 2022 and 2024 due to supply growth (Rapaport industry reporting).

Trend: Natural diamond prices fluctuate moderately with supply cycles; lab-grown prices show faster downward pressure due to scaling production.

Under age 35: Significantly higher likelihood of choosing lab-grown (industry surveys indicate Gen Z & Millennials lead adoption).

Sustainability-motivated buyers: ~60–70% of younger buyers cite environmental or ethical sourcing as a factor influencing choice (McKinsey jewelry consumer research).

Natural diamonds remain preferred among higher-income and traditional luxury buyers.

Lab-grown diamonds now hold 15–20%+ global market share, with rapid growth since 2015. The lab-grown stones sell at a 60–80% discount compared to natural equivalents. Also, the global diamond jewelry market remains a $90–100B+ industry, supporting millions of jobs worldwide

The diamond industry has been making mammoth revenues in every fiscal year, barring the Covid period, having a heavy impact on the overall global economy. 

Markup insight: Rough diamond mining value ($15–18B) translates into a retail jewelry market exceeding $90–100B due to cutting, polishing, branding, and retail margins.

The diamond industry supports an estimated 10 million jobs globally, including mining, cutting, polishing, retail, and related sectors (World Diamond Council).

In Botswana alone, diamonds account for roughly 30% of GDP and ~80% of export earnings. Major producers like Russia, Canada, and Botswana employ tens of thousands directly in mining operations.

The largest diamond ever found was 3,106 carats (Cullinan), and the most expensive diamond ever sold was $71.2 million (Pink Star). Also, the highest price per carat recorded was around $5.2 million. 

Throughout history, there have been many famous diamonds due to their size, price, and otherworldly beauty. 

1. Cullinan Diamond (1905) – 3,106 carats

Discovered in South Africa at the Premier Mine. It remains the largest rough gem-quality diamond ever found.

2. Sewelo Diamond (2019) – 1,758 carats

Found in Botswana by Lucara Diamond Corp.; second-largest rough diamond ever discovered. 

3. Lesedi La Rona (2017) – 1,109 carats

 Discovered in Botswana; later sold for $53 million.

4. Excelsior Diamond (1893) – 995 carats 

Discovered in South Africa, once the largest known diamond before Cullinan.

1. Pink Star (CTF Pink Star) – $71.2 million (2017, Hong Kong)

59.60-carat Fancy Vivid Pink diamond. 

2. Oppenheimer Blue – $57.5 million (2016, Geneva)

14.62-carat Fancy Vivid Blue diamond

3. Williamson Pink Star – $57.7 million (2022, Hong Kong)

 11.15-carat Fancy Vivid Pink diamond.

4. Lesedi La Rona (rough) – $53 million (2017)

Discovered in Botswana; sized 1,109 carats.

1. Williamson Pink Star (2022) – ~$5.2 million per carat

Highest verified price per carat for a diamond at public auction.

2. Pink Star (2017) – ~$1.2 million per carat

59.60-carat Fancy Vivid Pink diamond. 

3. The De Beers Blue (2022) – ~$3.9 million per carat

 15.10-carat Fancy Vivid Blue diamond sold for $57.5 million.

Based on certain fluctuations of diamond prices in the global market, you might wonder if investing in diamonds will be profitable for you. Let’s have a closer look at that.

Natural diamond prices rose steadily from the 1960s through the early 2010s, but have shown cyclical declines since 2015. 

However, polished diamond prices declined 15-25% in 2022-2024, amid lower global demand and lab-grown competition (Rapaport Price Index reports).

Diamonds do not generate yield (no dividends or interest), and returns depend on resale market conditions.

So, in conclusion, diamonds historically preserve value in select high-quality stones, but broad-market investment performance is inconsistent.

Gold prices are publicly traded daily. Meanwhile, diamond pricing lacks a centralized exchange; values vary by cut, clarity, color, certification, and buyer demand.

Retail resale value for standard natural diamonds is typically 20–60% below the original retail price, depending on quality and certification.

Auction-quality rare diamonds (large, fancy colored) may outperform average stones.

The global secondary diamond market is significantly smaller than the primary retail market, with limited standardized trading platforms.

Formed billions of years ago beneath Earth’s surface, diamonds became global trade commodities in India, surged during South Africa’s 19th-century discoveries, and were strategically marketed as symbols of modern romance in the 20th century.

Today, the industry stands at a transitional point. Natural diamond production remains steady at around 115–125 million carats annually, while lab-grown alternatives are reshaping pricing structures and consumer behavior. 

At the same time, the diamond sector continues to support millions of jobs worldwide and contribute significantly to the economies of major producing nations. So, not just some beautiful stones; rather, the history of diamonds is all about shaping global trade and markets over centuries.