Harvested to order · Every stone graded, every ring handcrafted

Diamond education

Know what you’re picking.

The four Cs, the ten shapes, and natural versus lab-grown — the plain-English version, so you can choose with confidence.

The four Cs

Cut, color, clarity and carat

Labs grade every diamond on four things. Together they decide how a stone looks — and what it costs.

Cut

How well the facets send light back to your eye. Cut has the biggest effect on sparkle, so it’s the last place to save.

BestLowest

Labs give a full cut grade mostly to round diamonds. For other shapes, look at polish and symmetry.

Color

How colorless the stone is, from D (icy white) down the alphabet to warmer tones. Once set, most people can’t tell G or H from colorless.

BestLowest

Clarity

How many tiny inclusions the stone has, and how easy they are to see. Plenty of VS2 and SI1 diamonds look perfectly clean to the eye.

BestLowest

Carat

Weight, not size: one carat is 0.2 grams. Shape and cut change how big a stone looks, but for a well-cut round diamond:

  • 0.50 ct — about 5.1 mm across
  • 1.00 ct — about 6.4 mm
  • 1.50 ct — about 7.3 mm
  • 2.00 ct — about 8.1 mm

Ten shapes

Pick a shape

Shape is the outline of the stone and the biggest style choice you’ll make. Choose one to see those diamonds in the builder.

RoundThe most sparkle of any cut, and the classic choice.OvalRound-like fire in a longer outline that slims the finger.CushionA soft square with rounded corners and a romantic glow.PrincessA crisp square with sharp corners and bright sparkle.EmeraldLong step-cut facets — less sparkle, more glassy flash.RadiantTrimmed corners with brilliant sparkle; square or long.AsscherA square step cut with deep, hall-of-mirrors facets.PearPart round, part marquise: a teardrop that points.MarquiseA long boat shape that looks big for its carat weight.HeartThe romantic one. Best from about half a carat up.

Origin

Natural or lab-grown?

Both are real diamonds, graded on the same four Cs. In the builder the origin is always marked, and you can filter to one or the other.

Natural

Formed deep in the earth over billions of years, then mined. Natural diamonds are rarer, and their prices reflect that.

Lab-grown

Grown in weeks from a tiny diamond seed. Chemically, physically and optically the same as a natural diamond, and usually far less expensive for the same size and grades.

Grading reports

Every stone comes with papers

Each diamond is graded by an independent lab — GIA or IGI — and gets a report with its own number. The report records the four Cs, the measurements, polish, symmetry and fluorescence.

Open Details on any diamond in the builder to see its lab and report number. You can look up GIA reports at gia.edu and IGI reports at igi.org.

What to look for on a report

  • Shape and measurements
  • Carat weight
  • Color and clarity grades
  • Cut, polish and symmetry
  • Fluorescence — none to faint is typical; strong can make some stones look slightly hazy

Seen enough? Let’s go picking.

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