A Comprehensive Guide to Understanding Diamond Prices

Figuring out how much diamonds cost might seem a bit tricky, but it’s not impossible. Just like any other market, the diamond market follows some rules. When you’re dealing with loose diamonds, the money you spend usually matches what you get in return.

However, picking the perfect diamond that fits your budget and matches your style can be tough. Diamond prices aren’t fixed; Yes! They change based on how good the diamond is, how rare it is and governed by some diamond giants as well.

This blog explores how diamond prices are decided and the things that make them go up or down. 

Diamond Pricing: De Beers and the Sightholders

De Beers, a renowned diamond giant, has historically held a significant stake in the diamond industry. While its dominance has waned over the years, it still exerts substantial control over diamond prices, with around 35-40% of the world’s rough diamonds under its influence. De Beers orchestrates this control through a series of “sights,” where a select group of diamond dealers, known as “sightholders,” convene to purchase diamonds directly from De Beers. This exclusive event, occurring ten times a year, plays a pivotal role in setting market prices.

The meticulous orchestration of these sights allows De Beers to manage supply and demand. In the face of falling diamond prices, the company can reduce supply or increase prices, thereby maintaining a semblance of stability. Conversely, the emergence of a new competitor prompts De Beers to flood the market with diamonds of similar quality, thwarting the competition.

The Role of the Rapaport Group and Diamond Grading

A major milestone in establishing stable diamond pricing came with the inception of the Rapaport Group in 1976. This innovative initiative introduced a diamond “rap list,” offering price benchmarks for various diamond cuts. This guide is published monthly in Rapaport magazine and updated weekly online on RapNet, providing invaluable insights for industry insiders. While it has empowered consumers to make more informed decisions, it has also curtailed the ability of dealers to manipulate prices.

Diamonds prices are determined using the “4 Cs” – Color, Clarity, Cut, and Carat weight. However, within these grades lie subtle differentiations that can significantly impact the loose diamond’s price. Factors like clarity modifiers and fluorescence further complicate the pricing equation. The artistry of precision cuts also contributes to the final price tag.

Shapes, Hues, and Fluorescence: A Multifaceted Pricing Landscape

Diamond shapes play a pivotal role in determining prices, with round diamonds commanding a premium due to their consistent demand. The choice of shape is influenced by the balance between maximizing stone mass and minimizing wasted rough material. Cushion-cut diamonds, currently in vogue, may carry slightly higher prices than other fancy shapes.

Hues within diamonds, even in higher colour grades, influence their affordability and desirability. On the other hand, Fluorescence is a unique trait of some diamonds, which can either enhance or diminish value depending on the colour and intensity. Blue fluorescence may improve the appearance of lower-grade diamonds, while yellow or green fluorescence usually lowers diamond prices.

Navigating Retail and Online Diamond Shopping

The advent of online diamond retailers has revolutionized the way consumers shop for wholesale loose diamonds. Online platforms offer competitive prices due to reduced overhead costs, while physical stores provide valuable services like maintenance, cleaning, and resizing. Comparing prices and services is essential to make an informed decision.

Usually, when people buy something from a regular store and then want to sell it later, they might get back about 30-50% of what they paid. However, if they buy directly from a reputed seller such as Uniglo Diamonds, they might only lose 5-10% when they sell and even the price doesn’t get affected by market conditions.


Diamond pricing is a multifaceted interplay of various factors, from industry giants like De Beers to the nuances of diamond characteristics. The evolution of diamond pricing, guided by market dynamics and industry initiatives like the Rapaport Group, has empowered consumers while standardizing prices. The intricate nature of diamond grading, encompassing the 4 Cs and beyond, highlights the importance of observing stones firsthand or seeking guidance from gemologists. When consumers understand the detailed mechanics of diamond prices, it empowers them to make educated choices.

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