How to Tell if a Lab Grown Diamond is High Grade
Lab grown diamonds have revolutionized the jewelry industry, offering environmentally friendly and ethically sourced alternatives to natural diamonds. But with their rising popularity comes the challenge of distinguishing high-quality lab diamonds from lower-grade options. In this comprehensive guide, we’ll explore how to evaluate lab grown diamonds using the same critical factors that gemologists use to grade natural stones.
- Understanding the 4Cs for Lab Grown Diamonds
- The Importance of Diamond Certification
- Evaluating Clarity in Lab Grown Diamonds
- Color Grading of Lab Created Diamonds
- Cut Quality: The Most Important Factor
- Carat Weight and Value
- Fluorescence Considerations
- Growth Technology Differences
- Tools and Techniques for Assessment
- Price as a Quality Indicator
- Conclusion: Making an Informed Decision
Understanding the 4Cs for Lab Grown Diamonds
Just like natural diamonds, lab grown diamonds are graded using the 4Cs: cut, color, clarity, and carat weight. These universally accepted standards apply equally to lab created diamonds as they do to natural ones. High-grade lab diamonds excel in all four categories, with exceptional brilliance and fire.
When shopping for diamond engagement rings featuring lab grown stones, understanding these criteria is essential. A truly high-grade lab diamond will display excellent light performance, minimal or unnoticeable inclusions, little to no color tint (unless it’s a fancy color diamond), and will be precisely cut to maximize brilliance.
At Springer’s Jewelers, we apply the same rigorous standards to evaluating lab grown diamonds as we do to natural diamonds in our emerald cut engagement rings and other collections.
The Importance of Diamond Certification
A hallmark of high-grade lab grown diamonds is proper certification from reputable gemological laboratories. The most respected lab for diamond certification is the Gemological Institute of America (GIA), which now provides specialized reports for lab grown diamonds. Other reputable labs include IGI (International Gemological Institute) and GCAL (Gem Certification & Assurance Lab).
When examining a lab diamond’s certificate, look for comprehensive details about the stone’s 4Cs, dimensions, polish, symmetry, and fluorescence. A high-quality certificate will also clearly state that the stone is laboratory-grown and specify the growth method used.
For pear-shaped engagement rings or oval diamond engagement rings, proper certification becomes even more important as these fancy shapes require specific proportions to display optimal brilliance.
Evaluating Clarity in Lab Grown Diamonds
Clarity refers to the absence of inclusions (internal flaws) and blemishes (surface irregularities). The GIA clarity scale ranges from Flawless (no inclusions or blemishes visible under 10x magnification) to I3 (inclusions visible to the naked eye).
High-grade lab grown diamonds typically fall in the VS (Very Slightly Included) range or better. While lab diamonds tend to have fewer inclusions than natural diamonds, they can still contain crystal growth features unique to the lab environment. These might include metallic inclusions from the growth catalyst or strain patterns from rapid growth.
When examining clarity, remember that the visibility of inclusions varies by cut style. For example, emerald engagement rings with step-cut diamonds reveal inclusions more readily than the faceting pattern of round solitaire engagement rings.
Color Grading of Lab Created Diamonds
For white diamonds, the ideal is colorlessness, graded on a scale from D (completely colorless) to Z (light yellow or brown). High-grade lab grown diamonds typically achieve excellent color grades, often in the colorless (D-F) to near-colorless (G-J) range.
One advantage of lab grown diamonds is the ability to produce stones with exceptional color consistency. This is particularly noticeable in fancy colored lab diamonds, which can display vibrant hues that would be extraordinarily rare and expensive in natural diamonds.
The setting material can influence how color is perceived. For instance, yellow gold engagement rings may make a faint yellow diamond appear whiter by contrast, while white gold engagement rings might accentuate any yellow tint in a lower color grade diamond.
Cut Quality: The Most Important Factor
Cut is arguably the most important factor in determining a diamond’s beauty and is the biggest indicator of whether a lab grown diamond is high grade. An excellently cut diamond will display optimal brilliance, fire, and scintillation, regardless of its origin.
The cut grade considers proportions, symmetry, and polish. For round diamonds, the GIA grades cuts as Excellent, Very Good, Good, Fair, or Poor. For fancy shapes like those used in oval engagement rings or pear engagement rings, cut quality is assessed but not formally graded.
High-grade lab diamonds feature precise facet alignment, excellent symmetry, and superior polish. Since lab diamonds are grown in controlled environments, cutters can often achieve exceptional precision, resulting in stones with outstanding light performance for hidden halo engagement rings and other exquisite styles.
Carat Weight and Value
Carat refers to a diamond’s weight, not its size. One carat equals 0.2 grams. While carat weight affects a diamond’s price, it doesn’t necessarily determine quality. A smaller, high-grade lab diamond may be more valuable than a larger, lower-quality one.
High-grade lab diamonds maintain their beauty and sparkle across all carat weights. However, as with natural diamonds, certain “magic sizes” (0.5ct, 0.75ct, 1ct, etc.) may command premium pricing due to consumer demand.
When selecting cushion engagement rings or princess engagement rings, remember that different shapes appear larger or smaller at the same carat weight due to how weight is distributed.
Fluorescence Considerations
Fluorescence is the diamond’s tendency to emit a soft glow (typically blue) when exposed to ultraviolet light. In natural diamonds, strong fluorescence can sometimes cause a hazy appearance in higher color grades, though this is rare.
In lab grown diamonds, fluorescence patterns may differ from natural diamonds and can sometimes help identify the stone’s origin. For high-grade lab diamonds, minimal to no fluorescence is generally preferred, although some buyers appreciate the unique character it can add to vintage engagement rings.
When considering sapphire engagement rings or other colored gemstone options alongside lab diamonds, note that fluorescence evaluation differs for colored stones.
Growth Technology Differences
Lab grown diamonds are created using two primary methods: High Pressure High Temperature (HPHT) and Chemical Vapor Deposition (CVD). The growth method can influence certain quality characteristics.
HPHT diamonds sometimes contain metallic inclusions from the catalyst used in their growth, while CVD diamonds might display growth patterns like graining or color zoning. High-grade lab diamonds from either process will have minimal growth-related features.
Some connoisseurs seeking non-traditional engagement rings appreciate knowing the specific technology used to create their lab diamond, as it adds to the stone’s unique story, particularly when set in distinctive styles like bezel engagement rings.
Tools and Techniques for Assessment
Professional jewelers use several tools to evaluate diamond quality, including 10x loupes, microscopes, diamond testers, and spectroscopes. While some of these can help consumers, the untrained eye may miss subtle quality indicators.
Modern technology has introduced consumer-friendly tools like portable spectrometers that can help identify lab grown diamonds and provide some quality information. However, for a truly comprehensive assessment, consulting with a professional gemologist at a reputable jeweler like Springer’s Jewelers remains the best approach.
When shopping for simple engagement rings or more elaborate halo engagement rings, ask to view the diamond under different lighting conditions to assess its performance.
Price as a Quality Indicator
While price shouldn’t be the only factor in determining quality, it can be a useful indicator. High-grade lab grown diamonds command premium prices within the lab grown market, though they remain significantly more affordable than comparable natural diamonds.
Be wary of lab diamonds priced far below market average, as they may have quality issues or lack proper certification. Conversely, a higher price point often reflects superior quality characteristics, particularly for specialized cuts like those featured in emerald cut diamond engagement rings.
When comparing options for yellow gold engagement rings or rose gold engagement rings, remember that setting quality and design complexity also influence the overall price beyond just the diamond’s grade.
Conclusion: Making an Informed Decision
Identifying high-grade lab grown diamonds requires understanding the same quality factors that apply to natural diamonds. The 4Cs, proper certification, growth characteristics, and overall light performance all contribute to a lab diamond’s grade and value.
Whether you’re considering natural diamond engagement rings or their lab grown counterparts, working with a trusted jeweler who offers transparent information is crucial. At Springer’s Jewelers, we provide detailed education on both lab grown and natural diamonds to help customers make choices aligned with their values and budget.
High-grade lab grown diamonds offer exceptional beauty and quality for classic engagement rings and vintage style engagement rings alike. By applying the knowledge from this guide, you’ll be well-equipped to select a stunning lab grown diamond that meets the highest quality standards.
Ready to explore high-grade lab grown diamonds for your engagement ring? Browse our collections of solitaire engagement rings, three stone engagement rings, and more, or schedule a consultation with our diamond experts to learn about the perfect lab grown diamond for your special moment.