Education

Learn about Loose Diamonds

Buying a loose diamond is easier when you understand grading, shape, and how stones look in real life—not just on paper. Use this guide as a starting point, then lean on our team for hands-on guidance.

Key points

Quick orientation

  • Cut most influences brilliance—don’t sacrifice it without a reason.
  • Color & clarity are graded ranges; “eye clean” matters as much as the letter on a report.
  • Carat is weight; face-up size also depends on shape and cut quality.
  • Certification from a reputable lab helps you compare apples to apples.

The 4Cs of diamonds

The 4Cs (cut, color, clarity, carat) are the standard language for describing a diamond. No single grade tells the whole story: a well-cut diamond can face up brighter than a larger stone with a weaker cut. Use the sections below to go deeper on each C, then compare stones in person whenever you can.

Cut

Cut is about proportions, symmetry, and polish—how the diamond returns light to your eye. GIA assigns a cut grade for round brilliants; other shapes are described differently but the idea is the same: a precise cut looks more lively.

Ideal vs. shallow vs. deep: too shallow or too deep and light leaks out the sides or bottom instead of returning through the crown. We help you balance cut grade with budget and size.

Color

Color for white diamonds is graded from D (colorless) to Z (light yellow or brown). Many buyers find a sweet spot in the near-colorless range where the face-up appearance still looks white in most lighting, especially once the diamond is set.

Metal choice matters too: a warmer diamond can look brighter set in yellow or rose gold.

Carat

Carat is weight (200 mg = 1 ct), not strictly “size.” Two diamonds of the same carat can have different diameters depending on cut depth and shape. When you compare options, look at measurements (mm) and how the stone looks in the setting you want.

Clarity

Clarity describes internal and surface characteristics. Few diamonds are truly flawless; many in the VS and SI ranges are eye clean—no visible inclusions without magnification. The right clarity grade depends on shape (some show inclusions more), size, and your tolerance for character under magnification.

Shapes

Round brilliant is the classic for maximum brilliance and standardized cut grading. Fancy shapes (oval, cushion, emerald, pear, etc.) offer personality and often a larger face-up look per carat, but brilliance and bow-tie effects vary—review videos and see candidates in person when possible.

Shape of Diamonds

A diamond's cut determines how brilliantly it catches the light—creating fire, depth, and that unmistakable sparkle—and how unforgettable the moment becomes.

  • Asscher Diamonds

    The asscher cut features a square shape with cut corners. A high crown with large step cut facets bestows more brilliance than the other popular step cut shape, the emerald shape. Asscher shaped diamonds are sleek and modern in solitaire settings, and their unique shape perfectly complements vintage-inspired styles.

  • Round diamonds

    Diamond shape refers to a diamond’s physical form, and is often one of the first attributes that couples consider when shopping for a diamond. While round diamonds are the most popular choice, many couples are also drawn to the distinctive look of non-round, or “fancy shaped” diamonds.

  • Princess diamonds

    Princess cut diamonds are the second most popular diamond shape. Princess cut diamonds possess the gorgeous sparkle of round brilliant diamonds in a distinctive square shape. They offer a contemporary look and the flexibility to work in almost any style of ring.

  • Cushion Diamonds

    Cushion cut diamonds combine the appeal of a square cut diamond but with soft, rounded edges, lending this shape a romantic feel. This timeless shape is derived from the old mine cut, and has been refined over hundreds of years. Cushion cut diamonds are a beautiful choice for any setting style.

  • Emerald diamonds

    Emerald cut diamonds are treasured for their elegant silhouette. The shallow pavilion and crown accentuate the clarity of the stone, while the reflective steps enhance the color and luster of the diamond

  • Pear diamonds

    Pear shapes feature a rounded edge tapering to a point at the opposite end. This unique shape flatters fingers and offers a distinctive look. A fusion of the marquise shape and the most popular round brilliant cut, pear shaped diamonds are intended to showcase the sparkle of the diamond, making it important to find a stone with great symmetry.

  • Radiant diamonds

    The radiant cut diamond combines the silhouette of an emerald cut diamond with the fire and sparkle of a round brilliant cut diamond. Due to its design, this shape requires more carat weight in the depth to maximize brilliance.

  • Oval Diamonds

    The ever-flattering oval shape is symmetrical and exhibits a similar fire and brilliance to round shaped diamonds. A scintillating twist on the classic round brilliant, the elongated shape can create the illusion of larger size. Oval diamonds are highly versatile, remarkably elegant, and distinctive.

  • Heart Diamonds

    The heart shaped diamond is an evocative signifier of true love. They shimmer with two symmetrical halves, creating a bold and romantic look. Heart shaped diamonds are especially popular in Claddagh designs, and offer a distinctive look in any engagement ring setting.

  • Marquise Diamonds

    The marquise shaped diamond features pointed ends with a curved middle for an eye-catching look. With a larger surface area than any other diamond shape, the marquise shape maximizes perceived size and lends a unique look to any setting style.

Anatomy of a diamond

Knowing a few terms helps when you read a lab report or talk with a gemologist: the table is the large top facet; the crown is above the girdle; the girdle is the outer edge; the pavilion is below the girdle to the culet. Proportions between these areas are what cut grading summarizes.

Diamond care

Diamond is hard but not indestructible—it can chip on a hard blow, and settings wear over time. Remove rings for heavy impact work, clean gently with approved methods for your metal and side stones, and have prongs inspected periodically so you do not risk losing the stone.

Loose diamond FAQs

What are the 4Cs?

Cut, color, clarity, and carat weight are the standard way diamonds are described. The right balance depends on your budget and what you notice when you see the stone—we will help you prioritize.

Which diamond certification do you trust?

We work with major grading labs such as GIA and IGI. Your report explains the diamond’s characteristics so you can compare options with confidence.

How do lab-grown and natural diamonds compare?

Both are real diamonds. Lab-grown diamonds offer value and traceability; natural diamonds have traditional rarity appeal. We carry both so you can choose what fits your story.

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