“Diamonds can be shattered with a hammer”

Many people commonly believe that because diamonds are the hardest known natural material, they are also indestructible. This widespread assumption often leads to the idea that a diamond could withstand any impact, including a forceful blow from a hammer, without sustaining damage. This misconception likely stems from a misunderstanding of what "hardness" specifically means in the context of material science, often conflating it with overall strength or toughness.

Scientifically, a diamond's exceptional hardness refers to its supreme resistance to scratching or abrasion. However, this property does not equate to invulnerability against impact. Diamonds possess a crystalline structure with distinct cleavage planes, which are inherent weak points within their atomic arrangement. A sharp, sudden impact, such as that delivered by a hammer, can exploit these planes, causing the diamond to cleave, chip, or even shatter into smaller pieces. This characteristic is precisely why diamond cutters can strategically split rough diamonds to achieve desired shapes.

The persistent belief that diamonds are unbreakable is often reinforced by their symbolic representation in popular culture as enduring and everlasting, particularly in jewelry. Furthermore, their use in industrial tools for cutting and grinding other very hard materials might lead people to conclude that if a diamond can cut through virtually anything, nothing can break it. This overlooks the critical distinction between a material's ability to resist scratching and its capacity to withstand a sudden, concussive force.