Everything You Need to Know About SI Clarity Diamonds

by Payton

The popularity of si diamonds amongst sellers and buyers of the product is one worthy of emulation, but the reason is not far fetched. Diamonds that have the si label are usually cheaper than other clarity diamonds, and as such, people tend to rush the option. Generally, there are many things to consider when picking a diamond to buy. Factors like the cut, the color, Clarity and weight of the diamond are important factors that we should consider. In this guide, we will explain what it means to have an si Clarity diamond, explaining what diamond Clarity actually means and how it affects diamond look and quality.

What is diamond Clarity

Diamond Clarity, as the name implies, is a measure of how pure and clear a diamond material is. The diamond Clarity measurement runs from a scale ranging flawless to included. If the diamond is pure, the scale will read the flawless scale, while if it has some inclusions, it will indicate it. The inclusions may be completely small, but because the diamond Clarity uses a magnifier that checks up to ten times clearer, these inclusions will not go unnoticed. If the scales read in the middle, it means the inclusions are small, hence the SI.

What is the meaning of SI in diamonds

As mentioned earlier, SI is an acronym for small inclusions or small imperfections. It is a name given to diamonds that have small imperfections after checking with the magnifier that sees clearly. Some of these imperfections may not be visible with your eyes, while some are not so visible. The ones that are visible are either very big or at a place that you can’t snub.

The Gemological Institute of America uses a six grade scale to group jewelry and the SI position is the second to the last. After the SI level, the next is the included, which means the diamond has too many inclusions that anyone can easily see.

Types of SI diamonds and their differences

There are two main types of si diamonds known as SI1 and SI2 diamonds. Some manufacturers refer to some diamonds as the SI3 diamonds. These diamond types can’t be classified as SI1 or SI2, but at the same time, they are not generally inclusions diamonds.

The difference between SI1 and SI2 is their inclusions. The inclusions under the SI1 grade are not visible without using the magnifier, but with the device you can see them easily. The SI2, on the other hand, has more visible flaws, but not very obvious. Many manufacturers of SI2 diamonds ensure that the flaws of these diamonds remain at the side and not the top. That way, when you view from the top, you won’t see anything, and even at the sides, you will only barely see these flaws.


An SI diamond can be a lot of things depending on what you want. But before you go investing some money into the six diamonds, it is best to understand what it means, how it works, the types, and other implications. We have explained every information needed to know about si Clarity diamonds in this guide. All you need to do is read through to understand and make informed decisions.

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