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The Hardest Substances On Earth

Many different factors go into deciding what the hardest substance on Earth is. For example, some people might look at the mineral content, while others might focus on the strength and durability of the material. This blog post will look at several different materials and discuss which one is the hardest. So stay tuned to find out!


Graphene is one of the most complex substances on Earth. It comprises a single layer of carbon atoms that are tightly bonded together in a hexagonal lattice. This structure gives graphene its strength and makes it harder than diamond. However, graphene is also extremely lightweight and flexible, and it can be used to create lightweight solid materials.

In addition, graphene is an excellent conductor of electricity and heat. These properties make graphene an ideal material for various applications, including aerospace, electronics, and energy storage. This amazing material will likely be used in even more innovative ways as graphene research continues.

Carbon Nanotube

Carbon nanotubes are one of the hardest known substances on Earth. They’re made of carbon atoms that are arranged in a hexagonal pattern, and they’re incredibly strong and stiff. In fact, they’re so strong that they can’t be cut with a diamond knife. However, carbon nanotubes also have some other unique properties. For example, they’re excellent conductors of heat and electricity and very good at absorbing light.

As a result, carbon nanotubes have a wide range of potential applications, from bulletproof vests to super-efficient solar panels. And because they’re so strong and stiff, carbon nanotubes could also be used to create solid materials for construction or engineering.

Metallic Glass

There are many different ways to measure hardness, but one of the most common is the Mohs hardness scale. This scale ranks materials on a scale of 1 to 10, with diamonds being the hardest substance at ten and talc being the softest at 1. However, some materials are even harder than diamonds. One of these is metallic glass, an artificial material with a hardness of around 12.5 on the Mohs scale.

Metallic glass is created by rapidly cooling molten metal, which prevents it from crystallizing. As a result, it has a disordered atomic structure that makes it extremely hard and robust. Metallic glass is so strong that it is often used in bulletproof windows and military armor.


Lonsdaleite is a hexagonal form of carbon, and it is one of the hardest known naturally occurring substances on Earth. It is found in meteorites, and it gets its name from the English town of Lonsdale, where the first samples were discovered. Lonsdaleite is more complex than diamonds, and it is also one of the few known materials that can scratch all other known forms of carbon.

In addition to being extremely hard, lonsdaleite is also exceptionally brittle. As a result, it is not suitable for use in jewelry or other applications where durability is important. However, its unique properties make it an interesting material for scientific study.


When it comes to hardness, the diamond is the undisputed king. This tough material is made up of pure carbon, and its strength comes from the strong chemical bonds between the atoms. A diamond is so hard that another diamond can only scratch it. Unfortunately, however, this incredible hardness also makes the diamond brittle, and it can shatter if hit with a blow from a hammer.

Diamond is still the hardest known naturally occurring substance on Earth despite its flaws. Artificial materials, such as cubic boron nitride and boron carbide, have been created even harder than diamond. However, these materials are not found in nature and are only used in specialized applications.


Aerogel is often cited as the world’s lightest solid, but that’s not entirely accurate. It’s a low-density network of interconnected pores, with each pore filled with air. Despite its fragile appearance, aerogel is incredibly strong. It can support up to 4,000 times its weight and has a compressive strength of 10,000 psi. Aerogel has been used as an impact-absorbing material in bulletproof vests to spacecraft.

So how does this solid and lightweight material made? The process begins with a silicon-based compound combined with a solvent to form a gel. The gel is then supercritically dried, removing the solvent at a pressure and temperature above its critical point. This leaves behind a network of air-filled pores, resulting in up to 99% air material.

Silicon Carbide

Out of all the substances on Earth, silicon carbide is widely considered one of the hardest. It is frequently used as an abrasive material and is known for its durability and strength. Silicon carbide is also resistant to high temperatures, making it an ideal material for many industrial applications. In addition, silicon carbide is so strong that it is often used in bulletproof vests and other protective gear.

While silicon carbide is one of the most complex substances on Earth, it is not indestructible. With enough force, it can be shattered or crushed. However, its strength and resilience make it a material that can withstand wear and tear.

Darwin’s Bark Spider

According to recent studies, the hardest substance on Earth is the exoskeleton of Darwin’s bark spider. Found in Madagascar, this spider can spin webs up to 25 meters in length. In addition, the silk that the spider produces is solid, and it has a tensile strength that is greater than that of Kevlar.

In addition, the silk is also resistant to breaking and stretching, making it one of the most durable materials known to man. While Darwin’s bark spider is not the only creature that produces tough silk, it is the most efficient at doing so. As a result, its exoskeleton is significantly more complex than anything else found on Earth.


In conclusion, there are a variety of complex substances on Earth, each with its unique properties. For example, while the diamond is the hardest naturally occurring substance, artificial materials, such as cubic boron nitride and boron carbide, are even more difficult. However, these materials are not found in nature and are only used in specialized applications.

The web of Darwin’s bark spider is one of the hardest known substances due to the spider’s ability to produce silk that is stronger than Kevlar. While all of these substances are incredibly hard, they are not indestructible. With enough force, they can be shattered or crushed. Nonetheless, they are all solid and resilient, making them some of the most complex substances on Earth.

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