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The World of Coloured Diamonds

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The World of Coloured Diamonds

The World of Coloured Diamonds

Quality diamonds with size, brilliance, and clarity are hard to find as it is. Add in colouration, which can occur mainly because of structural anomalies in the diamond crystal or certain impurities, and that diamond is even rarer.

It turns out the vast majority of diamonds (98.1%) are classified as Type 1 and have nitrogen as an impurity. This can make them white, yellow or brown in colour. The rest are classified as Type 2, and these make up the category of “more desired” coloured diamonds.

Structural anomalies can make these diamonds yellow, brown, orange, pink, red, or purple in colour. A small amount instead have boron as an impurity, which can make the diamonds blue or grey. Green diamonds can also occur if a diamond of another colour is exposed to radiation in a certain way.

Many hard assets investors consider things such as rare coins, paintings, or coloured diamonds as another way to preserve wealth. The rarity and uniqueness of these assets make them something special. While not fungible or a medium of exchange like something such as pure gold or silver, they do tend to hold their value over time. Things such as coloured diamonds also are extremely portable, which gives them a the advantage of wealth mobility over cash or other bullion.

Original graphic from: Excalibur Royale

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How Much Gold is in Fort Knox?

The United States Bullion Depository holds more than half of the Treasury’s $428B in gold reserves.

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In this graphic we compare Fort Knox’s gold reserves with central bank gold reserves worldwide.

How Much Gold Is in Fort Knox?

This was originally posted on our Voronoi app. Download the app for free on iOS or Android and discover incredible data-driven charts from a variety of trusted sources.

U.S. President Donald Trump has promised to visit Fort Knox “to make sure the gold is there.”

Officially, the United States Bullion Depository (commonly known as Fort Knox) holds over half of the Treasury’s $428 billion gold reserves.

In this graphic, we put that amount into perspective by comparing Fort Knox’s reserves with central bank gold reserves worldwide. The data comes from the U.S. Mint and the World Gold Council. For illustrative purposes, we considered a pallet of 1,190 gold bars (400 troy ounces each) weighing approximately 14.8 tonnes.

What Is Fort Knox?

Located in Kentucky, Fort Knox is a U.S. Army installation that serves as the primary storage site for America’s gold reserves. The facility was established in the 1930s to protect gold from potential foreign attacks.

The first gold shipment arrived in 1937 via U.S. Mail from the Philadelphia Mint and the New York Assay Office. During World War II, Fort Knox safeguarded important U.S. documents, including the Declaration of Independence, the Constitution, and the Bill of Rights. It has also housed international treasures, such as the Magna Carta and the crown, sword, scepter, orb, and cape of St. Stephen, King of Hungary, before they were returned in 1978.

Currently, it holds 4,175 tonnes of gold, equivalent to nearly half of China’s gold reserves and four times the Swiss central bank’s reserves.

ReservesGold (Tonnes)
🇺🇸 U.S. Reserves8,133
🏛️ Fort Knox4,175
🇨🇳 China2,280
🇯🇵 Japan846
🇨🇭 Switzerland1,040
🇮🇳 India876
🇰🇷 South Korea104
🇸🇬 Singapore220
🇧🇷 Brazil130
🇲🇽 Mexico120
🇹🇭 Thailand235

Only small samples have been removed for purity testing during audits; no major transfers have occurred for years.

Gold Bar Specifications

  • Size: 7 inches × 3 5/8 inches × 1 3/4 inches
  • Weight: 400 ounces (27.5 pounds)

Extreme Security

Only a select few know the full security procedures, and no single person knows how to fully open the vault.

In 1974, a group of journalists and a Congressional delegation were allowed inside—marking the first official visit since Fort Knox’s creation. Previously, President Franklin D. Roosevelt was the only person other than authorized personnel to access the vaults.

In 2017, Treasury Secretary Steve Mnuchin, Kentucky Governor Matt Bevin, and several Congressional representatives became the second group to visit the vault.

Learn More on the Voronoi App 

If gold was shared equally, how much would you get? Check out this graphic to find out.

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Charted: Top Suppliers of Aluminum and Steel to the U.S.

President Trump has imposed a 25% tariff on all steel and aluminum imports.

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Charted: Top U.S. Suppliers of Aluminum and Steel

Charted: Top U.S. Suppliers of Aluminum and Steel

This was originally posted on our Voronoi app. Download the app for free on iOS or Android and discover incredible data-driven charts from a variety of trusted sources.

U.S. President Donald Trump has imposed a 25% tariff on all steel and aluminum imports, marking one of the most discussed measures of his first month back in the White House.

But which countries are most affected by these tariffs?

This map illustrates the top suppliers of aluminum and steel to the United States in 2024. The data comes from the U.S. Census Bureau. Aluminum includes unwrought aluminum, plates, sheets, and strips; bars, rods, and profiles; foil; wire; pipes and tubes; castings and forgings; and tube or pipe fittings. 

Canada: The Largest Partner

Canada is by far the top supplier of both steel and aluminum to the United States. The neighboring country exported $9.4 billion worth of aluminum to the U.S. in 2024, significantly ahead of the second-largest exporter, the European Union, which exported $1.5 billion.

Canada also exported $7.1 billion worth of steel last year, compared to $7 billion from the European Union.

CountrySteel Imports (USD)Aluminum Imports (USD)
🇨🇦 Canada$7.1B$9.4B
🇲🇽 Mexico$3.5B$397M
🇧🇷 Brazil$3.0B-
🇨🇳 China$799M$809M
🇹🇼 Taiwan$1.3B-
🇰🇷 South Korea$2.9B$781M
🇩🇪 Germany$1.9B$318M
🇯🇵 Japan$1.7B-
🇮🇳 India$489M$445M
🇪🇺 European Union$7B$1.5B
🇦🇪 UAE-$917M
🇧🇭 Bahrain-$535M
🇦🇷 Argentina-$468M
🇹🇭 Thailand-$271M
🇬🇧 UK$440M-

Mexico, South Korea, and Brazil are also among the top suppliers of steel to the United States. Meanwhile, the country imports aluminum from other key partners, including China, the United Arab Emirates, South Korea, Bahrain, and Argentina.

A recent report by the Center for Strategic and International Studies (CSIS) noted that the U.S. produces less than 2% of the world’s primary aluminum.

Learn More on the Voronoi App 

If you enjoyed this graphic, be sure to check out this chart illustrating the GDP impact of Trump’s tariffs on China.

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