Lab Grown Diamond Clarity, Decoded
Lab grown diamond clarity is the quiet detail that decides whether a stone reads flawless to the eye or merely expensive on paper. In 2026, with lab-grown prices lower than ever, you can finally choose clarity on your own terms rather than your budget's.
Every lab-grown stone Roomy's sets is graded on the same four Cs as a mined diamond, and clarity is the C that quietly makes or breaks the sparkle. It describes how free a diamond is from tiny internal marks (inclusions) and surface marks (blemishes). The good news: because a certified lab diamond costs a fraction of its mined twin, spending up a grade or two for a cleaner stone is finally affordable. This guide walks the full clarity scale, names the grades actually worth buying, and shows where clarity matters most.
Those numbers set the frame. Clarity is judged at 10x magnification on the GIA scale of 11 grades, from Flawless down to Included. And because Statista puts the average retail price of a one-carat lab-grown diamond at roughly $855 in 2025, the budget math that once forced buyers toward lower grades has changed for good.
What Diamond Clarity Actually Measures
Clarity measures a diamond's relative freedom from inclusions and blemishes, graded under 10x magnification. Inclusions are internal (tiny crystals, feathers, or clouds formed as the diamond grew); blemishes are external surface marks. The Gemological Institute of America, or GIA, considers the size, number, position, nature, and relief of these characteristics before assigning one grade. A useful definition to carry into any showroom:
- Inclusion: an internal characteristic, such as a pinpoint or feather, formed while the crystal grew.
- Blemish: a surface-only characteristic, such as a tiny scratch or nick.
- Eye-clean: a diamond with no inclusions visible to the naked eye at normal viewing distance.
Lab-grown and mined diamonds are graded identically, and IGI, the lab that certifies the majority of lab-grown stones, applies the same clarity scale. If you want the plain-English version of the paperwork, our guide to IGI certified lab grown diamonds breaks down how to read the report.
The Lab Grown Diamond Clarity Scale, Grade by Grade
The lab grown diamond clarity scale runs through 11 grades in six named tiers, from Flawless to Included. Here is what each tier looks like in real life, and who it suits.
| Grade | What it means at 10x | Eye-clean? | Best for |
|---|---|---|---|
| FL / IF | No inclusions visible to a skilled grader | Always | Collectors, maximum-sparkle budgets |
| VVS1 / VVS2 | Inclusions very difficult to find | Always | Step cuts and heirloom pieces |
| VS1 / VS2 | Minor inclusions, hard to somewhat easy to see | Yes (VS1 always) | The value sweet spot |
| SI1 / SI2 | Noticeable to a grader, often clean to the eye in SI1 | Usually (SI1) | Smaller stones, tighter budgets |
| I1 to I3 | Obvious inclusions that can dull brilliance | No | Best avoided for fine jewelry |
The GIA scale describes the VS band precisely: its inclusions "range from difficult to somewhat easy for a skilled grader to see under 10x magnification," which is exactly why VS1 looks flawless to the rest of us. A stone like our Oval Diamond Solitaire Pendant (from $2,000) rewards a VS grade, because a single larger stone gives the eye more to inspect.
Which Lab Grown Diamond Clarity Grade Is Worth Buying
For most buyers, VS1 is the smartest lab grown diamond clarity grade: it is always eye-clean yet costs far less than VVS or Flawless. Because lab diamonds are already affordable, the price gap between grades is small, so you can hold clarity at a confident level and put the savings toward carat or a better cut. Use this quick framework:
- VS1: always eye-clean, the safest single pick for any shape or size.
- VVS2: a near-flawless look worth it on step cuts where clarity is exposed.
- SI1: frequently eye-clean in round stones under 1.5 carats, and the budget stretcher.
- Below SI2: skip it for pieces you will wear daily; inclusions can reach the surface.
Pieces with many small pave stones, like the Linear Diamond Half Eternity Band (from $700) or the Arc Diamond Band Ring (from $600), are forgiving: at small sizes, SI clarity reads perfectly clean. Save the higher grades for the hero stone.
How Cut and Shape Change the Clarity You Need
The cut of a diamond decides how much clarity you should pay for, because open, step-cut shapes reveal inclusions that brilliant cuts hide. Emerald and Asscher cuts use long, mirror-like facets that act like a clear window into the stone, so they benefit from VS1 or VVS clarity. An architectural, step-cut piece such as the Prism Diamond Band (from $800) is a good example of where a cleaner grade earns its keep.
Brilliant cuts do the opposite. The scissoring facets of a round or pear scatter light and camouflage small inclusions, which is why round studs like our Starlight Portal Diamond Stud Earrings (from $1,500) stay eye-clean even at SI1. If you love a step cut, read our round brilliant cut buyer's guide for the contrast in how facets handle light. And once your stone is chosen, the setting is your next decision: a warm metal moment is having its say, which we cover in our edit on bold gold jewelry for 2026.
Frequently Asked Questions
What is the best clarity for a lab grown diamond?
Is VS1 or VS2 clarity better for the money?
Do lab grown diamonds have inclusions?
What clarity should I avoid in a diamond?
Clarity you can see, priced the way it should be.
Every Roomy's stone is lab-grown and IGI certified, so you always know exactly what you are wearing.
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