1. What is the Diamond Weight Formula?

The diamond weight formula calculates the approximate carat weight of a round brilliant cut diamond based on its diameter and depth measurements. This formula is widely used in the jewelry industry for quick estimates.

2. How Does the Calculator Work?

The calculator uses the diamond weight formula:

Where:

• \( Diameter \) — Diamond's width in millimeters (mm)
• \( Depth \) — Diamond's height in millimeters (mm)
• 0.006 — Conversion factor for round brilliant cuts

Explanation: The formula accounts for the volume of the diamond and converts it to carat weight (1 carat = 0.2 grams).

3. Importance of Diamond Weight Calculation

Details: Carat weight is one of the "Four Cs" of diamond quality and significantly affects a diamond's value. Accurate estimation helps in appraisal, buying, and selling decisions.

4. Using the Calculator

Tips: Measure the diamond's diameter (width) and depth (height) in millimeters using precision calipers. Enter these values to get the estimated carat weight.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this formula?
A: It provides a good estimate for round brilliant cuts (±2-3%), but actual weight may vary based on cut proportions and girdle thickness.

Q2: Can this be used for other diamond shapes?
A: No, this formula is specific to round brilliants. Other shapes have different formulas based on their geometry.

Q3: What's the typical diameter for a 1-carat diamond?
A: Approximately 6.5mm, but this can vary slightly depending on depth percentage.

Q4: Why is depth important in the calculation?
A: Depth accounts for the three-dimensional volume of the diamond, not just its surface area.

Q5: How does carat weight affect diamond value?
A: Larger diamonds are rarer, so price per carat increases significantly at certain weight thresholds (e.g., 1ct, 1.5ct, 2ct).