Jewelry Certification & Valuation

AGS Platinum Grading Report

The American Gem Society (AGS) Platinum Grading Report is a comprehensive document that outlines the quality and characteristics of a diamond. It is one of the most respected and detailed reports in the diamond industry, providing buyers with crucial information to make informed purchasing decisions. This report focuses specifically on diamonds that have been cut to meet the AGS Platinum standard, which represents the highest level of cut quality.

Definition

The AGS Platinum Grading Report is an independent, third-party appraisal of a diamond's quality. It is issued by the American Gem Society Laboratories (AGSL), a renowned institution for diamond grading. The 'Platinum' designation specifically refers to the highest tier within the AGS's cut grading system, indicating a diamond that exhibits exceptional brilliance, fire, and sparkle. This report goes beyond the basic 4Cs (Carat, Cut, Color, Clarity) by providing more granular details about a diamond's cut performance.

Key Features

The AGS Platinum Grading Report is distinguished by its thoroughness and the specific insights it offers, particularly regarding the diamond's cut. Key features include:

Detailed Cut Analysis: Unlike many other reports, the AGSL provides a numerical rating for cut quality, from 0 (Super Ideal) to 10. A 'Platinum' grade signifies a score of 0. This analysis includes factors like brightness, fire, sparkle, contrast, and the proportions of the diamond, using advanced photometric and geometric modeling.
ASET (Angular Spectrum Evaluation Tool) Image: The report often includes an ASET image, which visually represents how a diamond returns light. Different colors on the ASET image indicate how effectively the diamond is utilizing light, with blues representing the brightest light return and reds indicating light leakage. A Platinum grade diamond will display an optimal ASET pattern.
Light Performance: Beyond just proportions, the AGSL evaluates how light travels within and reflects from the diamond, assessing its overall brilliance and scintillation.
Detailed Specifications: The report lists all the standard 4Cs – carat weight, color grade, and clarity grade – along with other important measurements like table percentage, crown angle, pavilion depth, and girdle characteristics.
Inclusion Mapping: For clarity, the report often includes a diagram that maps out any internal inclusions and external blemishes, showing their type, size, and precise location within the diamond.
AGSL's Reputation: The AGSL is known for its stringent grading standards and consistency, making its reports highly trustworthy.

Origin and History

The American Gem Society (AGS) was founded in 1934 by a group of independent jewelers who sought to establish and maintain the highest ethical standards and professional qualifications within the industry. The AGS Laboratories (AGSL) was established later to provide accurate and unbiased diamond grading services. The AGS developed its own unique cut grading system, which evolved over time to become more sophisticated. The Platinum grade was introduced as the pinnacle of this system, representing the absolute best in diamond cutting, aiming to provide consumers with a benchmark for superior diamond beauty and performance.

Grading & Quality Standards

The AGS Platinum Grading Report adheres to the AGSL's proprietary grading system, which is highly detailed. The most significant aspect for the Platinum designation is the cut grade.

Cut Grade

The AGSL's cut grading system ranges from 0 to 10, with 0 being the highest. A diamond receiving a 'Platinum' grade on its AGS report means it achieved a cut grade of 0. This indicates:

Exceptional Brightness: The diamond reflects almost all light that enters it, with minimal light leakage.
Optimal Fire: Dispersal of white light into spectral colors is well-balanced and vibrant.
Intense Sparkle: Scintillation, or the play of light as the diamond moves, is dynamic and captivating.
Precise Proportions: The diamond's angles and facet arrangements are expertly crafted to maximize light performance.
Aesthetic Appeal: The overall visual appeal is paramount, showcasing the diamond's beauty to its fullest potential.

Other 4Cs

While the cut is paramount for a Platinum grade, the report also details the other 4Cs:

Color: Graded on a scale from D (colorless) to Z (light yellow or brown), with D-F typically considered colorless and highly desirable.
Clarity: Graded on a scale from Flawless (FL) to Included (I3), indicating the presence or absence of internal inclusions and external blemishes. Diamonds graded Platinum are often of high clarity, though exceptional cut can sometimes compensate for minor inclusions if they don't detract from the overall appearance.
Carat: The diamond's weight, measured in carats.

Buying Guide

When considering a diamond with an AGS Platinum Grading Report, buyers should pay close attention to the following:

Understand the Platinum Grade: Recognize that this grade signifies the highest level of cut quality. This means the diamond should be exceptionally brilliant and fiery.
Review the ASET Image: If available, study the ASET image. Look for an even distribution of blues and minimal red or black areas, indicating excellent light return and minimal leakage.
Examine Other 4Cs: While cut is king for Platinum, ensure the color and clarity grades meet your personal preferences and budget. A Platinum cut grade can make a diamond with a slightly lower color or clarity grade appear brighter and more lively than a poorly cut diamond with higher grades in those categories.
Verify Report Details: Always check that the diamond's specifications on the report (measurements, GIA/AGSL report number) match the diamond itself.
Consider the Source: Purchase from reputable jewelers who are knowledgeable about AGS reports and can explain the nuances of the grading.
Compare Prices: Understand that diamonds with AGS Platinum grades will command a premium due to their superior cut quality. Compare prices for diamonds with similar specifications from different sources.

Price Range & Value Factors

Diamonds with AGS Platinum Grading Reports are generally priced at the higher end of the market due to their exceptional cut quality. The value is influenced by several factors:

The 4Cs: While cut is exceptional, the inherent quality of color, clarity, and carat weight will significantly impact the price. A larger, more colorless, and internally flawless diamond with a Platinum cut will be substantially more expensive than a smaller, near-colorless, and eye-clean diamond with the same Platinum cut grade.
Market Demand: The demand for high-quality diamonds, particularly those with superior cuts, can influence pricing.
Rarity: Diamonds that achieve the Platinum cut grade are rarer than those with lower cut grades, contributing to their value.
Brand and Retailer Markup: The reputation of the retailer and any associated brand markups will also affect the final price.
AGSL's Consistency: The AGSL's reputation for strict and consistent grading adds to the perceived value of its Platinum reports.

Diamonds with Platinum grades are often seen as investments in beauty and brilliance. While they may have a higher initial cost, their superior light performance can make them appear more valuable and desirable over time.

Care and Maintenance

Caring for a diamond, regardless of its grading report, is essential to maintain its brilliance. For diamonds with an AGS Platinum grade, preserving that sparkle is key.

Regular Cleaning: Clean your diamond jewelry regularly using a soft brush, mild dish soap, and warm water. Gently scrub the diamond and settings to remove oils and dirt that can dull its sparkle.
Professional Cleaning: Have your jewelry professionally cleaned and inspected by a jeweler at least once a year. They can ensure the settings are secure and remove any stubborn buildup.
Avoid Harsh Chemicals: Do not expose your diamond to harsh chemicals, such as chlorine, bleach, or ammonia, as these can damage the metal settings or, in rare cases, affect the diamond's surface over time.
Safe Storage: Store your diamond jewelry in a separate, soft-lined box or pouch to prevent scratches against other jewelry.
Remove During Activities: Take off your diamond jewelry when engaging in strenuous activities, household chores, or using lotions and perfumes, which can leave residue.

Pros and Cons

Pros:

Unmatched Brilliance: Represents the highest standard of diamond cut, offering superior light performance, fire, and sparkle.
Trustworthy Grading: Backed by the AGSL, known for its accuracy, consistency, and stringent standards.
Detailed Information: Provides extensive data, including ASET images and precise measurements, empowering buyers.
Visual Appeal: Diamonds with Platinum grades often appear more vibrant and lively than diamonds with lesser cuts, even if those diamonds have higher color or clarity grades.
Rarity: Achieves a level of cut perfection that is relatively rare, making these diamonds more desirable.

Cons:

Premium Price: Diamonds with Platinum grades command a higher price compared to those with lower cut grades, even with identical 4Cs otherwise.
Availability: Finding diamonds that meet the stringent criteria for a Platinum grade can be challenging, especially in certain shapes or sizes.
Overemphasis on Cut: Some buyers might overspend on cut quality while compromising on other aspects like color or clarity, which may not be ideal for their personal preferences.
AGSL vs. GIA: While highly respected, the GIA is the most widely recognized grading lab. Some consumers may prefer GIA reports due to familiarity, though AGSL's cut grading is considered by many to be more advanced.

Related Terms

AGSL (American Gem Society Laboratories): The grading entity that issues the report.
4Cs: Carat, Cut, Color, Clarity – the fundamental grading factors for diamonds.
ASET (Angular Spectrum Evaluation Tool): A device used to analyze a diamond's light performance.
Cut Grade: The assessment of how well a diamond's proportions and facets interact with light.
Brilliance: The brightness of a diamond caused by light reflecting within and from its surface.
Fire: The dispersion of white light into spectral colors.
Scintillation: The sparkle or flash of light produced when the diamond, light source, or observer moves.
Proportions: The angles and measurements of a diamond's facets and dimensions.

FAQs

What makes a diamond AGS Platinum grade?

A diamond earns an AGS Platinum grade when its cut quality is rated a 0 on the AGSL's scale of 0-10. This signifies exceptional performance in brightness, fire, sparkle, and contrast, achieved through precise proportions and facet arrangements.

Is an AGS Platinum grade better than a GIA Excellent cut?

The AGS Platinum grade (0) is generally considered to represent a higher standard of cut quality than a GIA Excellent cut. AGSL's grading system is more granular and uses advanced technology to evaluate light performance, offering a more comprehensive analysis of the cut.

Are AGS Platinum grade diamonds worth the extra cost?

For buyers who prioritize maximum brilliance and sparkle above all else, an AGS Platinum grade diamond can be worth the premium. It ensures you are getting a diamond with superior light performance. However, whether it's 'worth it' depends on individual preferences and budget.

Can a diamond with lower color or clarity still get an AGS Platinum grade?

Yes, it is possible. While high color and clarity are generally desirable, the AGS Platinum grade focuses primarily on cut quality and light performance. A diamond with a slightly lower color or clarity grade but an exceptional cut can still achieve a Platinum grade, and its overall appearance of brilliance might surpass that of a poorly cut diamond with higher color and clarity.

What should I look for on an AGS Platinum Grading Report?

Focus on the cut grade (should be 0), review the ASET image for optimal light return, examine the detailed proportion analysis, and ensure the color and clarity grades meet your expectations. Also, verify the diamond's physical measurements against the report.