Diamond Education

SI2 Clarity Diamonds

Embark on an enlightening journey into the world of diamonds, where SI2 clarity stones offer a fascinating study in value and beauty. Revered for their lustrous appeal, these diamonds provide an insightful glimpse into the complex grading system that determines their rarity and worth. As we delve into the specifics of SI2 diamonds, we'll uncover how they strike a perfect balance between quality and affordability, making them a smart choice for savvy jewelry enthusiasts. Join us in exploring the nuanced world of diamond clarity, where SI2 gems stand as a testament to elegance and informed choice.

SI2 Diamond from James Allen

SI2 Diamond from James Allen

Is SI2 Diamond Clarity Good?

SI2 diamonds, categorized as 'Slightly Included 2' by the Gemological Institute of America (GIA), feature inclusions visible under 10x magnification. While these imperfections may be visible to the naked eye, not all SI2 diamonds are alike. Approximately 30% are 'eye-clean,' where inclusions aren’t noticeable without close inspection, offering an attractive combination of beauty and affordability.

Whiteflash Eye Clean Information

This image highlights an important feature on Whiteflash's diamond information page: the 'eye clean' tag. Displayed prominently, this tag indicates that the diamond has been assessed and found to have no visible inclusions to the naked eye, conforming to the rigorous standards of eye-cleanliness. This visual marker serves as a quick and reliable guide for customers, helping them identify diamonds that offer clarity and beauty without the need for detailed examination, making their selection process easier and more informed.

Evaluating an SI2 diamond requires careful examination. High-resolution images and expert assessments are crucial, as the presence and impact of inclusions vary. While SI2 diamonds are often marketed for their value, discerning buyers should seek top-quality SI2 diamonds, as they represent the threshold of what is typically suitable for fine jewelry.

How are SI2 Diamonds Graded?

Grading of SI2 diamonds involves a meticulous process, primarily conducted by recognized institutions like the Gemological Institute of America (GIA). The grading is based on the "Four Cs" of diamond quality: color, clarity, cut, and carat weight. In the context of clarity, which is a crucial factor in determining a diamond's sparkle and brilliance, SI2 diamonds have noticeable inclusions or imperfections visible under 10x magnification. These inclusions can be tiny crystals, feathers, clouds, or other natural imperfections within the diamond​.

The SI2 grade is part of a broader clarity grading scale that ranges from the lowest clarity grade (I3) to the highest (FL), with SI2 falling in the middle. The GIA Diamond Grading Report, which assesses diamonds, includes a plotted diagram of the diamond's clarity characteristics and a graphic representation of its proportions. For standard round brilliant cut diamonds in the D-to-Z color range, the report also includes a GIA Cut grade.

Sample GIA Certificate

While SI2 diamonds may not match the perfection of higher clarity grades, they can still be beautiful and exhibit considerable sparkle in the right settings. The effectiveness of an SI2 diamond's sparkle largely depends on how well-hidden the inclusions are and their location within the diamond. For instance, inclusions near the girdle or the bottom of the diamond, rather than at the center, can make them less noticeable and affect the diamond's appearance less. The overall cut and shape of the diamond also play a significant role in enhancing its beauty despite the clarity grade.

Is Buying SI2 Diamond Worth It?

Determining the value of purchasing an SI2 diamond hinges on its "eye-clean" quality. An SI2 diamond that appears free of visible inclusions to the naked eye presents a compelling choice, blending affordability with aesthetic appeal. The cost savings when choosing an SI2 over an SI1 diamond can be substantial, offering a strategic option for those seeking to optimize their budget without significantly compromising on the visual qualities of the diamond. However, careful evaluation is crucial, as not all SI2 diamonds meet this eye-clean standard. This careful selection ensures that the diamond retains the desired brilliance and clarity, characteristic of higher-grade stones.

2.02 ct D SI2 Round Cut Loose Diamond

2.02 ct D SI2 Round Cut Loose Diamond from Whiteflash (Image taken from a video)

Will an SI2 Diamond Sparkle?

The sparkle in an SI2 diamond is predominantly influenced by its cut quality. A diamond with a high-quality cut, even at SI2 clarity, can display a remarkable level of brilliance and fire. When considering an SI2 diamond, prioritizing the highest cut quality is crucial to ensure maximum sparkle. This is because the cut determines how light is refracted within the diamond, affecting its overall brilliance. Therefore, selecting diamonds from vendors known for their superior cut quality is key to finding an SI2 diamond that combines clarity with the captivating sparkle characteristic of fine diamonds.

Discover the perfect blend of quality and brilliance with Whiteflash, celebrated for their exceptional cut diamonds that maximize sparkle, even at SI2 clarity. Explore the wide selections available at Blue Nile and James Allen too, where you'll find an array of gems that beautifully balance clarity and radiance. Each of these esteemed vendors offers a unique opportunity to select a diamond that shines with its own unique charm, ensuring your choice is not just a diamond, but a statement of elegance and value.

Which is Better, SI1 or SI2?

The "Slightly Included" clarity grade is subdivided into SI1 and SI2. SI1 diamonds have fewer and smaller inclusions compared to SI2 diamonds, which have more and potentially larger inclusions. However, this doesn't mean SI2 diamonds are inferior. Many SI1 diamonds, when focusing on cut quality, can appear just as stunning as diamonds with higher clarity grades. The choice between SI1 and SI2 boils down to individual preferences, budget, and the specific diamond's appearance.

GIA Clarity Scale/Chart

GIA Clarity Scale

Should You Consider Lab Diamonds?

Lab-grown diamonds have gained popularity in recent years due to their ethical production and affordability. These diamonds possess the same physical, chemical, and optical properties as natural diamonds. For those considering SI2 diamonds, lab-grown options might offer even better value, allowing buyers to potentially opt for higher clarity or larger carat weight within the same budget. It's an option worth exploring, especially for the environmentally conscious and value-driven buyer.


SI2 diamonds offer a unique blend of affordability and beauty, making them a viable choice for many diamond enthusiasts. While they might have inclusions, their overall appeal, especially when combined with an excellent cut, can be mesmerizing. Whether you opt for a natural SI2 diamond or explore lab-grown alternatives, the key is to make an informed decision that aligns with your values and preferences. After all, every diamond, irrespective of its clarity, tells a story of love, commitment, and timeless beauty.