For Insights

Diamonds are one of the most valued gemstones used in jewelry. Although they may appear similar at a glance, their prices can vary greatly. Some diamonds are sold for modest amounts, while others reach millions. This price difference is mainly due to several measurable and visible factors. Let us look at why some diamonds cost more than others and how these differences affect their value.

Color and Clarity

Diamonds come in a range of colors. While most people are familiar with clear or white diamonds, they can also occur in shades such as yellow, blue, green, and pink. These are known as fancy colored diamonds.

Among these, 粉紅鑽石 (pink diamonds) are considered very rare. Their color comes from a distortion in the diamond’s crystal structure during formation. This rare occurrence makes pink diamonds far more expensive than colorless ones. The deeper and more vivid the color, the higher the price.

Clarity also plays an important role. It refers to how free the diamond is from internal marks or external blemishes. Diamonds with fewer inclusions cost more because they allow more light to pass through, resulting in better brilliance.

Carat Weight

Another major factor is the diamond’s carat weight. This refers to how much the diamond weighs, not its size. Larger diamonds are more rare and are therefore more expensive per carat.

For example, a one-carat diamond is not twice the price of a half-carat. It can cost three to four times more. The price increases sharply with size because diamonds of larger weights are harder to find in nature.

However, carat weight alone does not determine value. A larger diamond with poor clarity or color may still be priced lower than a smaller diamond with higher quality in those areas.

Cut Quality

The cut of a diamond affects its brilliance and sparkle. It is not about the shape but how well the diamond’s facets reflect light.

A well-cut diamond reflects more light and appears more brilliant. Even if a diamond has excellent color and clarity, a poor cut can make it look dull.

Cut is often graded from Excellent to Poor. Diamonds with higher cut grades are more expensive because they give a better visual effect. A precisely cut diamond also looks bigger than it actually is, which adds to its appeal.

Rarity and Demand

Some diamonds are naturally harder to find. 粉紅鑽石 are one such example. Their supply is very limited, and most of them came from the Argyle mine in Australia, which has now closed. This has made them even more valuable.

Rarity increases demand, and when demand is high and supply is low, prices rise. This is one of the main reasons why diamonds of unusual colors or exceptional quality are sold at higher rates.

Certification and Grading

Diamonds that are certified by reputed labs like GIA or AGS are considered more reliable. These certificates give buyers clear information about the diamond’s color, clarity, carat, and cut. Certified diamonds usually command better prices because buyers trust the grading.

Uncertified diamonds may appear cheaper, but their actual quality might not match the claims. Therefore, diamonds with verified certification are always priced higher, as they offer more confidence to buyers.

Conclusion

The price of a diamond depends on several clear and measurable factors. Color, clarity, carat, and cut form the core of its value. Rarity, demand, and certification further raise the price. Understanding these points helps buyers make informed decisions and identify what features truly impact a diamond’s value.