1. What is the X Factor for Diamond Shape?

The X Factor is a measure used in diamond evaluation that combines proportions and symmetry to assess the overall quality of a diamond's cut. It provides a quantitative way to evaluate how well a diamond's facets interact with light.

2. How Does the Calculator Work?

The calculator uses the X Factor equation:

Where:

• \( Proportions \) — The proportions score of the diamond (unitless)
• \( Symmetry \) — The symmetry score of the diamond (unitless)

Explanation: The equation multiplies the proportions score by the symmetry score to give an overall X Factor rating for the diamond.

3. Importance of X Factor Calculation

Details: The X Factor is crucial for diamond grading as it directly affects the diamond's brilliance, fire, and scintillation. Higher X Factors generally indicate better light performance.

4. Using the Calculator

Tips: Enter the proportions and symmetry scores as provided by diamond grading reports. Both values should be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a good X Factor value?
A: Generally, X Factors above 0.8 are considered excellent, 0.6-0.8 are good, and below 0.6 may show noticeable light performance issues.

Q2: How are proportions and symmetry scores determined?
A: These are typically assessed by gemological laboratories using specialized equipment and trained graders.

Q3: Does X Factor replace traditional cut grades?
A: No, it complements them by providing a more quantitative measure of cut quality.

Q4: Can X Factor be used for fancy shaped diamonds?
A: This specific calculation is designed for round brilliants. Other shapes may require different calculations.

Q5: How does X Factor relate to diamond pricing?
A: Diamonds with higher X Factors typically command premium prices due to their superior light performance.