Complimentary Shipping IGI Certified Diamonds 14-Day Returns Lifetime Warranty
Skip to content
Diavlia

Learn the Language

The Four C’s,
made simple.

Move the sliders. See what changes. Forty years of gemology distilled into four scrollable sections, so you can shop with confidence, not guesswork.

Chapter 01 · The most important C

Cut

Cut determines how much light the diamond returns to your eye. A poorly cut D-color FL diamond looks dull. A well-cut I-color VS2 diamond sparkles across a room. If you only prioritize one C, make it this one.

Cut Grade

Excellent

Maximum light return. The standard we set every stone to.

FairGoodVery GoodExcellent

Our Standard

We only stock Very Good and Excellent cuts. The price difference between Good and Excellent is small, the visual difference is night and day.

Chapter 02 · From colorless to warm

Color

Diamonds are graded on a scale from D (completely colorless) to Z (distinctly warm). Beyond H, most untrained eyes cannot detect the difference face-up. Match the grade to your setting, white gold shows color, yellow gold hides it.

Color Grade

F

Still colorless face-up. Our most common choice for white-gold settings.

DEFGHIJ

Our Sweet Spot

G/H for white gold, I/J for yellow gold. You\u2019ll save 15–30% over D without a single person noticing.

Chapter 03 · How clean is clean enough

Clarity

Clarity measures internal imperfections (inclusions) and surface blemishes. The key word is “eye-clean”, a grade where nothing is visible without magnification. Most shoppers overpay for clarity they can\u2019t see.

Our Sweet Spot

VS1 or VS2. Eye-clean guaranteed, often 40–60% cheaper than Flawless. If the diamond passes our inspection, the inclusions are invisible even under a loupe held at arm\u2019s length.

Chapter 04 · Size isn’t everything

Carat

Carat is weight, not size. Two diamonds of the same carat weight can look visually different depending on cut and shape. Oval and pear shapes appear larger than round at the same weight because they spread wider.

Round brilliant, shown at approximate real size

Carat Weight

1.0 ct

Approximately 6.4mm across

A 1-carat round brilliant measures ~6.4mm. Going to 1.5 carats adds only 1mm of diameter but roughly 50% in cost, often a better move is a better-cut 1 carat.

0.50.751.01.52.03.0

In Summary

Prioritize Cut > Color > Clarity > Carat.

Cut drives sparkle. Color drives whiteness. Clarity that\u2019s “eye-clean” is enough. Carat is the last lever, bigger is only better if the first three are right.