1. What is the Gemstone Weight Formula?

The gemstone weight formula calculates the carat weight of a gemstone based on its volume and density. Carat is the standard unit of weight for gemstones, where 1 carat equals 200 milligrams.

2. How Does the Calculator Work?

The calculator uses the gemstone weight formula:

Where:

• \( \text{volume} \) — Volume in cubic millimeters (mm³)
• \( \text{density} \) — Density in grams per cubic centimeter (g/cm³)
• \( 0.2 \) — Conversion factor (1 carat = 0.2 grams)

Explanation: The formula converts the gemstone's mass (volume × density) into carats by dividing by 0.2 grams per carat.

3. Importance of Carat Calculation

Details: Accurate carat weight measurement is essential for gemstone valuation, setting prices, and jewelry design. It's one of the "Four Cs" (along with cut, color, and clarity) that determine a gemstone's value.

4. Using the Calculator

Tips: Enter the gemstone's volume in cubic millimeters and its density in g/cm³. Common densities: Diamond (3.52), Ruby (4.0), Sapphire (4.0), Emerald (2.72), Quartz (2.65).

5. Frequently Asked Questions (FAQ)

Q1: How do I measure gemstone volume?
A: Volume can be calculated from precise measurements of the gemstone's dimensions or by water displacement methods for irregular shapes.

Q2: Why is density important in this calculation?
A: Different gemstone materials have different densities, so two gems of the same size can have different weights.

Q3: How accurate is this calculation?
A: It's accurate for well-cut stones with known density. Accuracy depends on precise volume measurement and correct density value.

Q4: Can I use this for any gemstone?
A: Yes, as long as you know the correct density for the specific gemstone material.

Q5: What's the difference between carat and karat?
A: Carat (ct) measures gemstone weight, while karat (K or kt) measures gold purity (24K being pure gold).