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What is Visual Performance?

Visual Performance is VeraLume™’s proprietary score reflecting brilliance, fire, and face-up beauty. It is calculated through a multi-factor analysis of cut precision, polish, symmetry, light behavior, and structural clarity. The system also evaluates advanced criteria often excluded from other reports, such as growth line visibility and subtle color tone, providing a more complete picture of a diamond’s true beauty.

VeraLume™’s proprietary score for brilliance, fire, and face-up beauty. It combines cut precision, polish, symmetry, and light behavior with advanced factors like growth line visibility and subtle color tone, giving a fuller picture of a diamond’s beauty.

Grade Scale

Because brilliance, fire, and beauty deserve to be measured with the same precision as cut and clarity.

Excellent

100

Very Good

Good

Fair

Poor

100

Excellent

Very Good

Good

Fair

Poor

Excellent (90–100%)

Very Good (85–89%)

Good (80-84%)

Fair (75-79%)

Poor (74% and less)

What This Grade Reflects

Appeal of the face-up shape outline
Precision of facet patterning
Consistency of light return

Minimization of dark areas
Strength of scintillation and contrast
Balance of proportions that enhance beauty

Experience the Diamond

Visual Performance, brought to life in 360°

Elements of Visual Performance

Beyond the 4Cs, Visual Performance reflects the artistry and science of diamond grading. Each factor shown here contributes to a score that captures true brilliance and beauty.

Color Tone

Subtle undertones are carefully identified, even in colorless grades, to ensure accurate evaluation.

Pure

Brown TINT

Grey TINT

Blue TINT

Growth Lines

Internal growth features are examined under magnification to determine their impact on transparency and brilliance.

None

Slight

Moderate

Distinct

Facet Design

Crown and pavilion views illustrating exacting cutting styles that maximize face-up appearance, outline, and brilliance.

Crown and Pavillion Cut Diamond Illustration.

Proportions

Profile view measuring depth, table, crown, and pavilion angles to assess cut precision.

ASET Analysis

Light performance map showing brightness, contrast, and areas of light leakage.

Brightness

Less Bright

Light Leakage

Contrast

Hearts & Arrows

Symmetry patterns unique to round brilliants, confirming precise facet alignment.

Arrow Image

Heart Image

Visual Performance FAQ

How brilliance, fire, and face-up beauty are measured through VeraLume’s Visual Performance analysis.

What is Visual Performance in diamond grading?

Visual Performance measures how a diamond interacts with light, reflecting brilliance, fire, contrast, and face-up beauty. VeraLume uses a proprietary scoring system to evaluate these qualities more precisely than traditional grading alone. The system also assesses advanced factors often excluded from standard reports, including growth line visibility and subtle color tones.

How does Visual Performance differ from traditional cut grading?

Traditional cut grading focuses on proportions, while Visual Performance evaluates how those proportions actually influence light behavior, sparkle, and visual balance.

What factors contribute to a diamond’s Visual Performance score?

VeraLume analyzes cut precision, symmetry, polish, structural clarity, and light behavior to determine how consistently the diamond reflects and disperses light.

Why is light behavior important in diamond beauty?

Light behavior determines brightness, sparkle, and contrast. Even subtle variations in facet alignment or proportions can change how a diamond performs visually.

How does VeraLume measure brilliance and fire?

Brilliance and fire are evaluated through optical analysis and performance mapping, helping quantify how effectively the diamond returns white light and disperses color.

What does face-up beauty mean in grading?

Face-up beauty refers to how a diamond appears when viewed from the top, including brightness, symmetry, and balance, factors that influence a diamond’s first visual impression.

Can two diamonds with similar cut grades have different Visual Performance?

Yes. Diamonds with similar proportions may still differ in symmetry, facet precision, or internal structure, which can change how light moves through the stone.

How does VeraLume incorporate structural characteristics into performance grading?

Structural clarity and internal growth features are considered alongside optical measurements, as they can influence transparency and light return.

Why does VeraLume include performance grading alongside traditional metrics?

Traditional grading describes what a diamond is, while performance grading explains how it looks, bridging the gap between technical specifications and real-world appearance.

How does Visual Performance help buyers compare diamonds?

It provides a measurable way to understand sparkle, brightness, and balance, making visual differences clearer than relying on color and clarity grades alone.

Visual Performance