Diamond Education
Learn all about the 4C's of loose diamonds
Cut
A diamond’s cut is one of the most important factors in determining its overall beauty and brilliance. Cut refers not to the diamond’s shape, but to how precisely its facets, proportions, symmetry, and polish work together to reflect light. When a diamond is expertly cut, light enters the stone and reflects back through the top, creating the sparkle and fire diamonds are known for.
Cut grades generally range from Excellent to Poor. Even a diamond with exceptional color and clarity can appear less brilliant if it is poorly cut. Choosing a well-cut diamond can make a noticeable difference in how bright, lively, and visually impressive the stone appears.
Color
Diamond color is graded based on how much natural color is visible within the stone. The grading scale begins with D, representing a completely colorless diamond, and continues through Z, where warmer yellow or brown tones become increasingly noticeable.
Color differences between neighboring grades can be incredibly subtle, especially once a diamond is set into a piece of jewelry. The metal color, diamond shape, and setting can also influence how the diamond’s color appears. Selecting the right color grade is often about finding the ideal balance between appearance, personal preference, and budget.
Clarity
Every natural diamond is formed deep within the earth under intense heat and pressure, and many develop tiny characteristics during this process. Clarity refers to the presence of these internal characteristics, called inclusions, and external characteristics, known as blemishes.
Diamonds are evaluated based on the number, size, location, and visibility of these characteristics. While higher clarity grades indicate fewer imperfections, many inclusions are microscopic and cannot be seen with the naked eye. An eye-clean diamond can offer exceptional beauty without necessarily requiring the highest clarity grade, making this an area where thoughtful selection can provide excellent value.
Carat
Carat refers to a diamond’s weight rather than its physical dimensions. One carat equals 200 milligrams, but two diamonds with the same carat weight can look noticeably different in size depending on their shape, proportions, and quality of cut.
While carat weight plays an important role in a diamond’s appearance and price, bigger does not always mean better. A beautifully cut diamond may appear larger and more brilliant than a heavier diamond with less desirable proportions. When selecting a carat weight, consider how the diamond looks on the hand as well as how its size works with the setting, style, and overall budget.