Originating from deep within the earth, diamonds are one of the rarest minerals in the world, having captured gazes with their unique brilliance and beauty for centuries. Let’s explore their history and grading criteria.
The authenticity and value of diamonds are determined by four criteria—carat, cut, clarity, and color. These are known in English as the four Cs. A diamond is evaluated based on their combined effect—value increases with a higher carat, a more precise cut, and a clearer diamond.
Different diamond cuts reflect light in different ways. When purchasing a stone, it is advisable to prefer Ideal or Fine cuts. With both of these cuts, light reflects back out of the diamond, making the stone beautifully brilliant. “Cut” does not refer to the diamond’s shape, but rather relates to its proportions and symmetry. A diamond’s beauty depends on its cut more than any other factor, followed by color and then clarity. A diamond’s proportions refer to the relationship between the facets’ size, shape, and angles. Various combinations are possible, all of which determine exactly how the diamond reflects light.
To evaluate diamond colors, an international alphabetical scale is used, ranging from D (practically colorless) to Z (pale brown or yellow). The most common choices are colors G and H, which are characterized by an excellent balance of price and quality.
A diamond’s crystal lattice is formed from carbon atoms, and the unit of measurement for a diamond’s weight is the carat, which is equal to 0.2 grams.
To evaluate the mass of diamonds, a method was needed to weigh very small loads. Mother Nature provided the perfect tool. The seeds of the carob tree are small and consistent in size, generally weighing 0.2 grams. These were used as counterweights for small quantities,
To evaluate diamond clarity, the Gemological Institute of America (GIA) scale is used, which consists of 11 grades. FL (Flawless) denotes a flawless diamond, while IF (Internally Flawless) indicates a pure diamond with only minor surface blemishes. VVS1–VVS2 means very, very small inclusions and minor surface blemishes. In VS1–VS2 and SI1–SI2 grades, defects are easily noticeable under 10x magnification. In a diamond with I1 clarity, inclusions are visible to the naked eye when looking through the crown, but they do not affect brilliance. There are also noticeable surface blemishes.
Diamonds were discovered about 4,000 years ago, but their formation dates back over a billion years. Since ancient times, they have been valued for their extraordinary strength and beautiful radiance. A polished diamond is also a symbol of perfection—one only needs to consider the word “brilliant.”
The word “diamond” originates from two Ancient Greek words: “adamas” (unbreakable, untameable) and “diaphanes” (transparent); the name refers to eternal love. Since Ancient Greek times, diamonds and diamond jewelry have traditionally been regarded as symbols of love.
As early as the 1st century AD, Pliny the Elder wrote in his encyclopedia, Naturalis Historia, that diamonds are considered the hardest stones ever found. Due to these properties, the diamond has become a symbol of strength.
The formation of a diamond requires extreme conditions. To crystallize into a diamond, carbon atoms must be at a depth of at least 150–200 kilometers underground or be subjected to a pressure of at least 50 kilobars at a temperature of 900–1200 °C.
Diamonds reach the Earth’s surface due to geothermal movements within the Earth’s interior. Diamond fragments are contained in a rock called kimberlite, which moves along with magma. Later, the diamonds are dispersed by floodwaters or, conversely, concentrate in specific areas.
Certain countries are primarily known for their diamond wealth, where large quantities of diamonds have been discovered beneath the surface. The largest diamond producers are Botswana, Australia, the Democratic Republic of the Congo, Russia, and South Africa.
A diamond is considered “pure” (or “flawless”) if it has no visible inclusions or blemishes under 10x magnification.
