Editor’s Note
This article explores the classification of the four major gemstones—diamond, sapphire, ruby, and emerald—as recognized by the mineral and gemstone industry. We delve into the unique properties and significance of each, starting with the diamond, renowned as the hardest natural substance.

The mineral and gemstone industry identifies the four major gemstones as diamond, sapphire, ruby, and emerald. This classification sparked significant curiosity among netizens.

Diamond is recognized as the hardest substance on Earth. It is the only gemstone mineral composed of a single element: carbon (C).
Ruby exhibits a red hue, often associated with fire and blood. It has historically symbolized heat, passion, powerful strength, and authority.

The origin of the name ‘sapphire’ comes from the Greek word ‘sappheiros,’ meaning ‘blue.’ Colors other than blue are distinguished as pink sapphire or yellow sapphire.

Emerald is a gemstone so beloved for its color that the shade is commonly referred to as ’emerald green.’