Understand what you’re buying. Choose what’s right for you.
An honest, plain-language guide to lab-grown diamonds. The 4Cs, the trade-offs, and what actually matters when you’re buying.
A lab-grown diamond is a diamond.
A lab-grown diamond is real diamond — pure carbon arranged in the same crystal lattice as a stone formed in the earth. Same hardness (a perfect 10 on the Mohs scale). Same brilliance, fire, and refractive index. Same chemical and optical properties. The only difference is origin: weeks of carefully controlled science instead of billions of years of geological pressure.
Even trained gemologists cannot distinguish a lab-grown diamond from a mined one without specialized equipment. They are diamonds in every way that matters — to the eye, to the touch, to the certificate.
The advantage: you get a stone of exceptional grade — the kind you would otherwise pay a steep premium for — at a price that lets quality come first.
In order of what matters most.
Most guides list the 4Cs alphabetically. We list them by visual impact — how much each one actually changes how a diamond looks on your finger.
Cut
Cut is the only one of the 4Cs the human controls — it determines how light enters and exits the diamond, and therefore how much it sparkles. Two diamonds of identical color, clarity, and carat can look dramatically different if one is well cut and the other isn't.
Cut grades go: Ideal · Excellent · Very Good · Good · Fair · Poor. Beyond Excellent, the difference is invisible to most people, but everything below Excellent is visibly less brilliant.
Every diamond we set is Excellent or Ideal cut. We do not compromise on the one factor that determines a diamond's brilliance.
Carat
Carat measures weight, not size. One carat equals 200 milligrams. A 1-carat round diamond is roughly 6.5mm across; a 2-carat is about 8mm. Bigger carat means more material, exponentially more cost.
Pricing also jumps at round numbers. A 0.95-carat costs noticeably less than a 1.00-carat — even though the visual difference is essentially zero. Worth knowing if budget is a factor.
Carat is the personal decision — match it to your finger, your hand size, and your budget. Smaller stones (0.7–1.0ct) are classic and elegant; larger stones (1.5ct+) make a statement. Both look extraordinary at our quality grade.
Color
Color is graded on a letter scale from D (completely colorless) to Z (light yellow or brown tint). The further down the alphabet, the warmer the stone appears.
D, E, and F are all called colorless. To a trained eye in lab lighting, there are tiny differences. To the human eye on a finger, they look identical.
Every colorless diamond ring we sell is E color — the second-highest grade on the entire scale, indistinguishable from D to the naked eye. Our fancy color diamonds (yellow, pink, blue, green) are all natural-looking, vivid color saturations.
Clarity
Clarity measures the absence of internal flaws (inclusions) and surface blemishes. The grades, from best to worst: FL · IF · VVS1 · VVS2 · VS1 · VS2 · SI1 · SI2 · I1 · I2 · I3.
Most people overspend on clarity. The difference between VVS1 and VS2 is invisible without 10× magnification — but the price difference is significant. The grade you actually want is the highest one where every stone is still eye-clean.
Every diamond we set — colorless or fancy color — is VVS or VS clarity. Whether you choose a classic engagement ring or a vivid pink diamond pendant, you are getting a stone with no inclusions visible to the naked eye. Most have none visible under 10× magnification either.
The highest grades. Without the markup.
Most online jewelry stores quietly drop quality to compete on price. We do the opposite — set every grade at the top, and price it where it should have been all along.
| Grade | Typical Online | Mohana Jewels |
|---|---|---|
| Cut | Good to Very Good | Excellent or Ideal |
| Color (colorless rings) | G to J | E |
| Clarity | SI1 to SI2 | VVS to VS |
| Certification | Often unverified | IGI or GCAL |
Eight silhouettes, one is yours.
Shape is the most personal choice. There is no “best” — only what catches your eye.
Round Brilliant
57 facets of maximum brilliance. The classic. Hides flaws best — light disperses through the entire stone.
Oval
An elongated round. Same brilliance, more visible carat per dollar. Lengthens the finger.
Cushion
Soft squared corners. A romantic, antique feel. Catches light in a softer, more poetic way than round.
Princess
A perfect square with sharp corners. Modern, architectural, geometric. Best in solitaire settings.
Emerald
Step-cut rectangle. Long, glassy flashes instead of fire. Sophisticated and understated.
Pear
Teardrop shape — round on one end, pointed on the other. Asymmetric, eye-catching, looks larger than its carat.
Marquise
Football-shaped, pointed at both ends. The most visible carat per dollar of any cut.
Radiant
Cushion silhouette with brilliant faceting. Brilliance of a round, shape of a cushion.
How the metal holds the stone.
The setting changes how the diamond catches light, how secure it sits, and how the ring feels on your hand. Match it to your lifestyle.
Solitaire
A single stone, all attention on the diamond. The most enduring choice, never goes out of style.
Halo
Small diamonds encircle the center stone, making it look 30% larger and adding extra fire.
Pavé Band
Diamonds set into the band itself. Glamour without distraction from the main stone.
Three-Stone
Past, present, future. A center stone flanked by two smaller diamonds. Visual presence.
Bezel
Metal wraps the stone's edge entirely. Modern, low-profile, the most protective setting — best for active hands.
Channel
Small diamonds set in a continuous channel along the band. Smooth, modern, snag-free for daily wear.
What the paper means.
Every diamond ships with an independent certificate.
A grading certificate is the diamond’s passport — an independent record of exactly what you’re buying. We use the two most rigorous labs in the industry: IGI and GCAL, both specialized in lab-grown diamond grading.
Each certificate documents:
- The 4Cs — cut, color, clarity, and carat weight
- Precise dimensions and proportions
- A plotted diagram of any inclusions
- Fluorescence rating
- A unique laser inscription on the diamond’s girdle
What to focus on.
Because every Mohana piece already meets the same high standard — Excellent or Ideal cut, E color on colorless rings, VVS to VS clarity — your only choices are the personal ones.
| Decision | How to choose |
|---|---|
| Shape | Pick the silhouette you love most. Round for maximum brilliance, oval for a larger look, emerald for a vintage feel, princess for modern lines. |
| Carat | Match your budget and your finger. 0.7–1.0ct is classic and elegant, 1.5–2.0ct is statement-making. Both look extraordinary at our quality grade. |
| Setting | Match your lifestyle. Bezel for active hands, halo for visual impact, solitaire for timeless minimalism, three-stone for symbolic richness. |
| Metal | Match your skin tone and wardrobe. Platinum is hypoallergenic and most enduring, 18k yellow gold warms cool tones, white gold is the safe classic, rose gold flatters every skin tone. |
| Stone color | Colorless E for traditional engagement and elegance, or a fancy color (yellow, pink, blue, green) for personality and one-of-a-kind expression. Both are equally fine and equally graded. |