Clarity plays an important role in both the appearance and value of a gemstone. It can influence how bright or transparent a stone looks, how much character it has, and in some cases, how suitable it is for everyday wear.
When choosing a gemstone, understanding clarity can help you decide what matters most to you. Some people are drawn to a clean, crisp stone with very few visible inclusions, while others love gemstones with more obvious natural characteristics and individuality. Neither is necessarily better. It comes down to the gemstone itself, how it will be worn, and what you personally find beautiful.
What Is Clarity?
Clarity refers to the natural characteristics found within a gemstone, known as inclusions. These can include tiny crystals, fine needles, veils, growth lines, colour zoning, small fractures, or other features that developed as the gemstone formed deep within the earth.
Some gemstones are typically valued for having fewer visible inclusions. Diamonds, for example, are commonly graded according to how noticeable their inclusions are under magnification. In many cases, the fewer inclusions a diamond has, the higher its clarity grade.
Coloured gemstones can be quite different. Many naturally contain more inclusions, and these characteristics are often accepted as part of the stone rather than viewed simply as flaws. Emeralds are a good example. They are well known for their internal features, which can give each stone its own unique appearance and character.
This is why clarity should always be considered in the context of the individual gemstone. What may be considered undesirable in one type of stone can be completely normal in another.
Inclusions Can Help Tell a Gemstone’s Story
Inclusions are particularly interesting because they can provide valuable clues about how a gemstone formed.
Natural gemstones develop under different combinations of heat, pressure, minerals and geological conditions. During this process, tiny materials can become trapped within the growing crystal, or the gemstone may develop internal structures that remain visible once it is cut and polished.
Gemmologists examine these features under magnification and use them alongside other testing methods to help identify gemstones and better understand their formation.
That does not mean every inclusion automatically proves that a stone is natural. Gemstone identification involves looking at a range of characteristics and, when necessary, using specialised gemological testing. However, inclusions can be an incredibly useful part of that process.
Rather than being viewed only as imperfections, they can be thought of as a small record of the gemstone’s formation, evidence of the conditions it experienced as it developed over millions of years.
How Clarity Affects Appearance
Clarity can have a noticeable effect on the overall look of a gemstone.
Some inclusions are so small that they can only be seen under magnification and have almost no impact on the stone’s appearance. Others may be visible to the naked eye and can influence how transparent, bright or lively the gemstone appears.
In some stones, a small number of inclusions can add character without distracting from the colour or brilliance. In others, heavy inclusions may make the gemstone appear cloudy or prevent light from travelling through it as effectively.
Where an inclusion sits within the gemstone can matter as well. An inclusion positioned directly through the centre of a stone may be more noticeable than one close to the edge, even if they are a similar size.
This is one of the reasons gemstones are best assessed as a whole rather than judged by a single characteristic or grading number.
Clarity and Durability
Clarity is not only about appearance. Certain inclusions can also affect a gemstone’s durability.
Many internal characteristics have little or no effect on how safely a stone can be worn. However, larger fractures or inclusions that reach the surface may create weaker areas within the gemstone and make it more vulnerable to chipping or damage.
This becomes particularly important when choosing a stone for a piece such as an engagement ring that will be worn frequently and exposed to everyday knocks and bumps.
The position of the inclusion, the gemstone's natural toughness, its shape and the style of setting all need to be considered together.
A more included gemstone may still be completely suitable for jewellery when it is thoughtfully designed and protected within the setting. Likewise, a stone with excellent clarity is not automatically indestructible.
Finding the Right Balance
Clarity is just one part of choosing a gemstone.
Colour, cut, size, durability and budget all work together to determine which stone is right for you. Sometimes choosing a slightly more included gemstone can allow you to prioritise a richer colour, a larger size or a more unusual cut while staying within your budget.
For coloured gemstones in particular, I would rarely recommend choosing a stone based on clarity alone. Colour and overall beauty are often far more important than whether a gemstone contains a few visible natural features.
A gemstone does not need to be perfectly clear to be beautiful.
In fact, the tiny inclusions and individual characteristics inside a stone are often what make it completely unique. The goal is not necessarily to find a flawless gemstone, but to find one where its colour, clarity, character, durability and price all feel right for you and the piece you are creating.