1. What Is Carat Weight?

The term carat refers to a diamond’s weight, not its physical size. One carat equals 0.2 grams (200 milligrams). Larger diamonds are rarer, which increases their price per carat — but two diamonds with the same weight can appear different in size depending on their cut quality and shape.

A well-cut 1.00-carat round lab diamond measures about 6.5 mm in diameter, while a 2.00-carat measures around 8.1 mm.

2. Carat vs. Size — Why Cut Matters

A diamond’s cut determines how efficiently it reflects light. Poorly proportioned diamonds may carry excess weight in the pavilion, appearing smaller from above despite higher carat weight. Always prioritize cut quality over weight for maximum brilliance.

3. Carat Weight and Price

Diamond prices increase exponentially with carat weight, especially at “magic sizes” like 1.00, 1.50, 2.00, and 3.00 carats. By choosing weights slightly under these marks — such as 0.90, 1.40, or 1.90 carats — you can save significantly without a visible difference in size.

Because lab-grown diamonds are typically 60–70% less expensive than mined diamonds, you can often choose a higher carat weight while maintaining top color and clarity.

4. Ideal Carat Weight for Every Style

• 0.75–1.00 ct: Classic everyday size with balanced sparkle.
• 1.25–1.75 ct: Elegant and noticeable without being overwhelming.
• 2.00 ct +: Statement size that highlights brilliance and presence.

The right carat weight depends on personal preference, ring style, and hand size. Focus on proportions and overall sparkle rather than the number alone.

5. Our Lab-Grown Diamond Standards

• IGI or GIA certified for authenticity and quality.
• H or better color and VS1 or better clarity guaranteed.
• Verified under 20× magnification for precision symmetry.
• Ships within 3–6 business days via FedEx Insured Delivery (adult signature required).

6. Balancing All 4 C’s

The key to a breathtaking diamond is balance. Combine Cut, Color, Clarity, and Carat to achieve the ideal mix of size, sparkle, and value. Learn more in The 4 C’s of Lab-Grown Diamonds.

For an official explanation of how the 4Cs interact, view the GIA guide on which of the 4Cs is most important — the global authority in diamond grading.