What Factors Determine the Value and Rarity of Fancy Shape Lab Diamonds?


Engaging Introduction:

Lab-grown diamonds have gained immense popularity in recent years. They offer a sustainable and affordable alternative to mined diamonds while maintaining the same dazzling beauty. Within the realm of lab diamonds, fancy shape stones have captivated the attention of jewelry enthusiasts worldwide. The allure of these unique shapes lies in their rarity and extraordinary beauty. However, have you ever wondered what factors determine the value and rarity of fancy shape lab diamonds? In this article, we will delve into the fascinating world of fancy shape lab diamonds and explore the key elements that contribute to their value and scarcity.

What Defines a Fancy Shape Diamond?

Fancy shape diamonds encompass a broad spectrum of shapes, from the classic emerald and princess cuts to the more intricate heart, pear, and marquise cuts. Unlike round brilliant diamonds, which adhere to strict proportions and symmetry, fancy shape diamonds offer a realm of endless possibilities. Each fancy shape possesses its own unique charm, allowing individuals to express their individuality through their jewelry choices.

The Impact of the 4Cs on Fancy Shape Lab Diamonds


When assessing the value of fancy shape lab diamonds, the traditional 4Cs of diamond grading – carat weight, color, clarity, and cut – play a crucial role. Let us explore how these factors influence the worth and rarity of fancy shape lab diamonds.

Carat Weight:


Carat weight refers to the size of the diamond and is one of the most significant determinants of value. However, the perception of size can vary between different fancy shapes. For instance, elongated shapes like marquise or pear cuts may appear larger than round brilliant diamonds of the same carat weight due to their elongation. Thus, when evaluating the value of fancy shape lab diamonds, it is essential to consider both the carat weight and the actual size of the stone.



Color plays a critical role in determining the allure and value of fancy shape lab diamonds. The Gemological Institute of America (GIA) grades color on a scale ranging from D (colorless) to Z (light yellow or brown). However, the impact of color can vary depending on the shape of the diamond. For instance, the elongated facets of emerald-cut diamonds tend to highlight color more than round brilliant cuts. Hence, fancy shape lab diamonds with higher color grades are generally rarer and more valuable.



Clarity refers to the presence of internal and external flaws, known as inclusions and blemishes, respectively. While clarity is an essential aspect of diamond grading, the visibility of these imperfections can differ based on the shape of the stone. For example, brilliant-cut diamonds with their faceting pattern tend to hide flaws better, making higher clarity grades more crucial. On the other hand, step-cut diamonds like emerald or asscher cuts have larger open tables, making inclusions more noticeable. Therefore, the clarity requirements and thresholds for fancy shape lab diamonds may differ from round brilliant cuts.



Cut quality directly impacts the brilliance and fire of a diamond, irrespective of its shape. While the traditional round brilliant diamonds adhere to a specific set of cut proportions, fancy shape lab diamonds offer more flexibility. As a result, evaluating cut quality for fancy shapes becomes subjective. Ideally, a well-cut fancy shape lab diamond exhibits excellent symmetry, proportion, and polish, accentuating its unique beauty. This attention to cut quality enhances the value and rarity of fancy shape lab diamonds.

The Influence of Shape on Rarity and Value


The shape itself is a crucial factor in determining the rarity and value of fancy shape lab diamonds. Some shapes, like the round brilliant, tend to be more readily available and, therefore, may have a lower value compared to other less common shapes. Additionally, certain fancy shapes require more rough material to be sacrificed during the cutting process, resulting in higher wastage and, consequently, increased rarity and value. For instance, heart and pear-shaped diamonds typically involve significant diamond loss during cutting, making them rarer and pricier than other shapes.

The Importance of Symmetry and Proportion


In the world of fancy shape lab diamonds, symmetry and proportion play a vital role in determining their value and desirability. Symmetry refers to the precision and alignment of a diamond's facets, while proportion relates to the relationship between the diamond's dimensions. Both these factors significantly influence the overall beauty and visual appeal of the stone. Well-proportioned fancy shape lab diamonds with excellent symmetry command higher values due to their exceptional aesthetic qualities.

The Role of Popular Trends


As in any industry, popular trends have a significant impact on the value and rarity of fancy shape lab diamonds. The demand for certain shapes can fluctuate over time, making them more or less accessible in the market. For instance, princess-cut diamonds experienced a surge in popularity during the 1990s and early 2000s, making them more abundant and lowering their value. Conversely, unique and distinctive fancy shapes that are currently on-trend can be harder to find and, consequently, more valuable.


Fancy shape lab diamonds offer a vast array of captivating options for those seeking a distinctive and personalized piece of jewelry. While the value and rarity of these fancy shapes are influenced by traditional factors like carat weight, color, clarity, and cut, other elements such as shape, symmetry, proportion, and popular trends also play significant roles. By understanding these factors, you can make an informed decision when selecting fancy shape lab diamonds that suit your taste and style. Whether it's an elegant emerald cut, a dazzling heart shape, or a unique marquise, the beauty and rarity of fancy shape lab diamonds are sure to mesmerize for years to come.


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