Calculating Diamond Weight By Measurement

Diamond Weight Formula:

\[ Weight = \frac{Length \times Width \times Depth \times Specific\ Gravity}{200} \]

Length (mm):

Width (mm):

Depth (mm):

Specific Gravity:

g/cm³

Diamond Weight:

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1. What is Diamond Weight Calculation?

The diamond weight calculation estimates the carat weight of a diamond based on its physical dimensions (length, width, depth) and specific gravity. This formula provides an accurate assessment of diamond weight without direct weighing, which is particularly useful for mounted stones.

2. How Does the Calculator Work?

The calculator uses the diamond weight formula:

\[ Weight = \frac{Length \times Width \times Depth \times Specific\ Gravity}{200} \]

Where:

\( Length \) — Diamond length measurement (mm)
\( Width \) — Diamond width measurement (mm)
\( Depth \) — Diamond depth measurement (mm)
\( Specific\ Gravity \) — Diamond density (typically 3.52 g/cm³)

Explanation: The formula calculates the volume of the diamond and multiplies by its specific gravity to determine weight, then converts to carats (1 carat = 200 mg).

3. Importance of Diamond Weight Calculation

Details: Accurate diamond weight estimation is crucial for valuation, pricing, certification, and insurance purposes. It helps determine the carat weight when direct weighing is not possible.

4. Using the Calculator

Tips: Enter precise measurements in millimeters. Use calipers for accurate results. The default specific gravity of 3.52 is standard for diamonds, but can be adjusted for other gemstones.

5. Frequently Asked Questions (FAQ)

Q1: Why divide by 200 in the formula?
A: The division by 200 converts the result from milligrams to carats, since 1 carat equals 200 milligrams.

Q2: What is the standard specific gravity for diamonds?
A: The standard specific gravity for diamonds is 3.52 g/cm³, though it can vary slightly depending on diamond type and impurities.

Q3: How accurate is this calculation compared to actual weighing?
A: With precise measurements, this calculation can be very accurate (within 1-2%), though actual weighing is always preferred when possible.

Q4: Can this formula be used for other gemstones?
A: Yes, but you must use the correct specific gravity value for the particular gemstone (e.g., 4.00 for corundum, 3.53 for zircon).

Q5: What tools are needed for accurate measurements?
A: Digital calipers or a millimeter gauge are recommended for precise length, width, and depth measurements.