Diamond Clarity

Understanding Diamond Clarity

At Stienhardt & Stones, we believe every diamond tells a story. One of the key elements of that story is clarity — a factor that influences both beauty and value. Understanding clarity can help you choose a diamond that shines with confidence.

Diamond clarity scale from Flawless to Included

What Is Diamond Clarity?

Diamond clarity refers to the presence of internal inclusions or external blemishes. These natural characteristics form during the diamond’s creation and are often microscopic. Clarity grades are set by the Gemological Institute of America (GIA) using the scale below:

  • FL (Flawless): No inclusions or blemishes visible under 10× magnification.
  • IF (Internally Flawless): No internal flaws, only minor surface blemishes.
  • VVS1 – VVS2: Very, very slight inclusions. Extremely difficult to detect under 10× magnification.
  • VS1 – VS2: Very slight inclusions, hard to see even under 10× magnification.
  • SI1 – SI2: Slightly included; inclusions more noticeable but often not visible to the naked eye.
  • I1 – I3: Included; inclusions easily visible to the eye and may affect brilliance.
Diamonds and rough stones with tweezers

Why Is Diamond Clarity Important?

Clarity affects how much light passes through a diamond. Fewer inclusions = greater brilliance. However, many inclusions are so small they don't affect visual beauty, making clarity a subjective choice that balances appearance and value.

How to Choose the Right Diamond Clarity

1. Look for Eye-Clean Diamonds

An eye-clean diamond appears flawless to the naked eye, even if its clarity grade is lower. Great choices include:

  • VS1–VS2: Often indistinguishable from higher grades without magnification — excellent value.
  • SI1: May show minor inclusions but still offers beauty at a more accessible price point.
2. Consider the Diamond’s Size

In larger diamonds, inclusions are easier to spot. Choosing a higher clarity grade may be more important if you're selecting a stone above 1.5 carats.

3. Match the Clarity to the Cut

Brilliant cuts like round or princess hide inclusions well. Step cuts like emerald and Asscher reveal more due to their open facets — higher clarity may be preferred.