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VS Diamond vs. SI Diamond – All You Need To Know | GDC


If you’re looking to buy diamonds, you’ve probably already understood the basics of the diamond clarity scale. You might have come across the terms VS and SI clarity diamonds. And like the majority of people, you must’ve wondered what they are.


So, in this blog, we’ll tell you all about VS and SI diamonds and how to understand diamond grades. Whether you’re buying lab diamonds or natural diamonds, this guide will help you make informed purchase decisions.


What is VS diamond?

VS means Very Slightly included. These are diamonds that have very slight inclusions. Inclusions are flaws. In VS diamonds, the flaws are miniscule and hard to notice by the naked eye.


What is SI diamond?

SI means Slightly Included. These are diamonds that have slight inclusions. These diamonds have more flaws than VS diamonds. SI diamonds, too, look flawless to the naked eye.


Let’s visually understand the diamond clarity scale table.


Why is diamond clarity important?

When assessing diamond quality, the most important factors to be considered are: cut, color, carat, and clarity. While all four of these aspects are important, clarity plays a key role in the performance of diamonds, and hence, should be one of the main deciding factors.


Both VI and SI diamonds have flaws that are not visible by the naked eye, and hence, they are considered good to buy. The flaws of these two types of diamonds can be visible only with a 10x magnifying equipment.


Going below SI grade diamond is best avoided. Because diamonds below this grade might have visible flaws. Because you might end up with a diamond that may get damaged soon.


It’s important to understand diamond clarity because:


Other factors to consider when buying diamonds

Apart from clarity, diamond cut and diamond shapes are also key factors to consider when buying gemstones. Let’s understand some factors that impact diamond grading.



What diamond should you buy — VI or SI?

Both VI and SI diamonds are good quality diamonds. These diamonds have inclusions that are not visible to the naked eye and are cheaper than diamonds that are higher on the diamond clarity scale such as VVS1 and VVS2.


The advantage of choosing VI and SI diamonds is that you’d be paying much less for diamonds that look just like VVS1 and VVS2. And if that’s the case, why should you pay more? Therefore, it’s perfectly safe and alright to buy both VI and SI diamonds.


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