SIRIUS ICE™ DIAMOND INFORMATION

Diamond color refers to the natural tint visible within a diamond and is one of the key elements that determine its quality and value.

The Gemological Institute of America (GIA) grades diamond color on a scale from D (completely colorless) to Z (noticeable yellow or brown tint).

Colorless diamonds (D-F) are the rarer and more valuable because they allow the most light to pass through, resulting in exceptional brilliance. However, near-colorless diamonds (G–H) often offer an excellent balance between appearance and value, as their faint tints are barely noticeable to the untrained eye once set in jewelry.

Clarity measures the purity of a diamond by evaluating the presence of internal inclusions or external blemishes formed during its creation.

These natural imperfections are graded on a scale that ranges from Flawless (FL) — meaning no visible inclusions under 10x magnification — to slightly included (SI1).

There are lower clarity grades (SI2–I3), where imperfections are visible to the naked eye.

Higher clarity grades result in a cleaner, more brilliant diamond, though many inclusions are microscopic and do not affect beauty.

Choosing a diamond with minimal visible inclusions ensures both visual appeal and structural integrity.

Carat weight refers to the size and mass of a diamond, with one carat equaling 200 milligrams.

While carat weight directly impacts price, it’s not the sole indicator of beauty or brilliance.

Two diamonds of the same carat weight can look very different depending on their cut quality and proportions.

Larger diamonds are rarer and often more valuable, but the ideal carat weight ultimately depends on personal preference, budget, and how the diamond’s proportions complement the jewelry design.

Perhaps the most critical of the 4Cs, diamond cut determines how well a diamond interacts with light—affecting its sparkle, brilliance, and overall beauty.

A well-cut diamond reflects light internally and disperses it outward through the top of the stone, creating that signature diamond fire and scintillation.

Cut grades range from Ideal and Excellent to Poor, based on symmetry, proportion, and polish.

Even a colorless and flawless diamond can appear dull if poorly cut, making cut quality a top priority when selecting a diamond.

Diamond grading is the process of professionally assessing a stone’s quality based on the 4Cs: color, clarity, carat, and cut.

Reputable organizations like the GIA and GCAL provide grading reports that verify a diamond’s attributes and authenticity. These reports serve as identification and ensure transparency in the buying process, offering confidence to buyers that they are investing in a genuine, accurately described diamond.

A grading report is essentially a diamond’s “passport,” confirming its characteristics and quality.

Diamond light performance measures how effectively a diamond captures, reflects, and emits light to create sparkle and brilliance.

It is influenced by factors such as cut precision, symmetry, and proportions. The three key components of light performance are brilliance (white light return), fire (dispersion of colored light), and scintillation (sparkle when the diamond moves).

A diamond with superior light performance will radiate lively flashes of color and light, making it appear more vibrant and eye-catching—even beyond what the traditional 4Cs can fully capture.