<div>Pure gold is soft and is usually alloyed with other metals, such as silver, copper, platinum or palladium, to increase its strength. Gold alloys are used to make jewelry, decorative items, dental fillings and coins. Gold is a good conductor of heat and electricity, and does not tarnish when it is exposed to the air, so it can be used to make electrical connectors and printed circuit boards. </div><div>

<div>Pure gold is soft and is usually alloyed with other metals, such as silver, copper, platinum or palladium, to increase its strength. Gold alloys are used to make jewelry, decorative items, dental fillings and coins. Gold is a good conductor of heat and electricity, and does not tarnish when it is exposed to the air, so it can be used to make electrical connectors and printed circuit boards. </div><div>

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<p>In mineralogy, diamond is a metastable allotrope of carbon, where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice. Diamond is less stable than graphite, but the conversion rate from diamond to graphite is negligible at ambient conditions. Diamond is renowned as a material with superlative physical qualities, most of which originate from the strong covalent bonding between its atoms. In particular, diamond has the highest…

<p>In mineralogy, diamond is a metastable allotrope of carbon, where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice. Diamond is less stable than graphite, but the conversion rate from diamond to graphite is negligible at ambient conditions. Diamond is renowned as a material with superlative physical qualities, most of which originate from the strong covalent bonding between its atoms. In particular, diamond has the highest…

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The taaffeite gemstone (pronounced TAR-fight) is purple to red and was first discovered in 1945. Count Edward Taaffe bought a set of spinels and noticed something odd about one of them: the gemstone displayed double refraction, while a spinel does not. Taaffeite was thus the only gemstone that was first identified through a faceted gemstone. <div>

The taaffeite gemstone (pronounced TAR-fight) is purple to red and was first discovered in 1945. Count Edward Taaffe bought a set of spinels and noticed something odd about one of them: the gemstone displayed double refraction, while a spinel does not. Taaffeite was thus the only gemstone that was first identified through a faceted gemstone. <div>

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William Hyde Wollaston (who also discovered palladium, which doesn't appear on this list of most expensive substances), an English chemist, discovered rhodium in crude platinum ore. <div>Though the name comes from the Greek word for "red", there's nothing red about it. It is a strong, hard metal, and is often used to improve the hardness and conductivity of other metals.</div><div>

William Hyde Wollaston (who also discovered palladium, which doesn't appear on this list of most expensive substances), an English chemist, discovered rhodium in crude platinum ore. <div>Though the name comes from the Greek word for "red", there's nothing red about it. It is a strong, hard metal, and is often used to improve the hardness and conductivity of other metals.</div><div>

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<p>Lysergic acid diethylamide, abbreviated LSD or LSD-25, is the most expensive drug on the list. A very strong, mood-altering hallucinogen, its price per gram is only mitigated (for users) by its incredibly small dosage (measured in millionths of grams). </p><p>Its effects are unpredictable, and depend on everything from the person's expectations to their surroundings to how they react to the experience itself.</p><p>Attached to this learning is a 45-minute video documentary on the uses and…

<p>Lysergic acid diethylamide, abbreviated LSD or LSD-25, is the most expensive drug on the list. A very strong, mood-altering hallucinogen, its price per gram is only mitigated (for users) by its incredibly small dosage (measured in millionths of grams). </p><p>Its effects are unpredictable, and depend on everything from the person's expectations to their surroundings to how they react to the experience itself.</p><p>Attached to this learning is a 45-minute video documentary on the uses and…

<p>Lysergic acid diethylamide, abbreviated LSD or LSD-25, is the most expensive drug on the list. A very strong, mood-altering hallucinogen, its price per gram is only mitigated (for users) by its incredibly small dosage (measured in millionths of grams). </p><p>Its effects are unpredictable, and depend on everything from the person's expectations to their surroundings to how they react to the experience itself.</p><p>Attached to this learning is a 45-minute video documentary on the uses and…

<p>Lysergic acid diethylamide, abbreviated LSD or LSD-25, is the most expensive drug on the list. A very strong, mood-altering hallucinogen, its price per gram is only mitigated (for users) by its incredibly small dosage (measured in millionths of grams). </p><p>Its effects are unpredictable, and depend on everything from the person's expectations to their surroundings to how they react to the experience itself.</p><p>Attached to this learning is a 45-minute video documentary on the uses and…

Learn what makes these 16 materials so expensive. You won't believe what people are doing to get their hands on these expensive substances.

Learn what makes these 16 materials so expensive. You won't believe what people are doing to get their hands on these expensive substances.

Painite, which is named after its 1950s discoverer, Arthur C.D. Pain, is so rare that most people do not know what it is. Until recently, only a very small number of stones were considered large and clear enough to be worth cutting into gemstones. More recently, additional sources have been found, but it is still incredibly rare.<div><div>

Painite, which is named after its 1950s discoverer, Arthur C.D. Pain, is so rare that most people do not know what it is. Until recently, only a very small number of stones were considered large and clear enough to be worth cutting into gemstones. More recently, additional sources have been found, but it is still incredibly rare.<div><div>

Meth is expensive and dangerous, but it at least does something

Meth is expensive and dangerous, but it at least does something

Heroin is processed from morphine, which in turn comes from the poppy plant. Heroin usually appears as a white or brown powder. Street names for heroin include "smack," "H," "skag," and "junk." <div>

Heroin is processed from morphine, which in turn comes from the poppy plant. Heroin usually appears as a white or brown powder. Street names for heroin include "smack," "H," "skag," and "junk." <div>

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