Graff Authentication Guide

Where Diamonds Come First

Graff is the house that made diamonds into a brand. While the French houses trade on centuries of heritage, Graff built its reputation in a single generation through one simple strategy: acquire and cut the world's most exceptional diamonds. Authentication here is about understanding what extreme diamond quality looks like and why Graff's approach is fundamentally different.

Here's what collectors need to know.

Graff History: The Diamond Merchant's Rise

1960: Laurence Graff, 22, opens his first workshop in London with a partner.

1962: Graff Diamonds established under his sole name.

1970s: Starts acquiring major diamonds. The "King of Diamonds" reputation begins.

2008: Acquires the Wittelsbach Diamond (35.56 carats, deep blue).

2010: Purchases the Lesedi La Rona rough (1,109 carats, one of the largest ever discovered).

2013: Purchases the Graff Pink for $46 million at auction—then a world record for a diamond.

Today: Vertically integrated from mine to boutique. One of the world's largest high-end diamond dealers.

The difference: Graff isn't primarily a jewelry house that uses diamonds. They're a diamond house that makes jewelry to showcase the stones.

The Graff Philosophy

Understanding Graff means understanding their priorities:

Diamonds first: The stone dictates the design, not the other way around Vertical integration: They control their supply from sourcing through cutting to setting The "Graff Cut": Their proprietary cutting style maximizes brilliance Big and exceptional: They're known for large, high-quality stones, not dainty pieces Modern: No centuries of heritage—just six decades of diamond dominance

This affects authentication. You're evaluating diamond quality as much as craftsmanship.

Iconic Graff Collections

Butterfly Collection

Design: Realistic butterfly motifs, wings set with diamonds Signature: Articulated wings that move

What to look for:

• Movement quality in articulation
• Diamond matching across wings
• Symmetry of butterfly shape
• Stone graduation from center to edges
• Naturalistic proportions

The Butterfly test: The wings should flutter naturally. Stiff or overly mechanical movement isn't right.

Icon Collection

Design: The classic Graff ring—solitaire or three-stone Focus: Showcasing exceptional center stones

What to look for:

• Center stone quality (D-F color, VS+ clarity typical)
• Platinum setting (Graff's standard for important pieces)
• "GIA" certificate matching the stone
• Setting that maximizes light return
• Minimal metal visibility from face-up view

Thread Collection

Design: Delicate, feminine pieces with dancing diamonds Character: Lighter feel than typical Graff

Spiral Collection

Design: Twisted, dynamic shapes with graduated diamonds What to examine: Flow of the spiral, stone graduation, movement

Tilda's Bow Collection

Named for: Graff's muse Design: Bow motifs, often with significant diamond content

The Diamond Question

With Graff, authentication partially shifts to the diamonds themselves:

What Graff diamonds look like:

• Exceptional cut quality (light performance is paramount)
• High color grades (D-F typical for important pieces)
• Clean clarity (VS+ for most pieces, often IF/VVS for major stones)
• Excellent symmetry and polish
• GIA certification for significant stones

The Graff Cut:

• Their proprietary modification to classic cuts
• Designed to maximize brilliance and fire
• Requires examining light performance, not just proportions

When to be suspicious:

• Mediocre diamond quality in a "Graff" piece
• Stones that look dull or lifeless
• Inconsistent quality across matched sets
• Missing GIA papers on significant stones

Where to Find Graff Marks

Rings:

• Inside the band
• "GRAFF" signature
• Metal mark (typically Pt950 or 750)
• Sometimes serial number

Necklaces:

• Clasp tag
• Near the bail
• Inside larger decorative elements

Bracelets:

• Clasp mechanism
• Inside links
• Attached tag

Earrings:

• Back of earring
• Clip mechanism
• Post

The Graff Signature

Standard format:

• "GRAFF" — primary signature
• "GRAFF LONDON" — sometimes with location
• Serial numbers on contemporary pieces

Signature character:

• Clean, precise engraving
• Consistent font
• Often accompanied by metal marks
• Serial numbers traceable to Graff records

Graff vs. Traditional Houses

What's different:

The authentication difference: With Cartier, you're examining French hallmarks and design heritage. With Graff, you're evaluating diamond quality and modern London craftsmanship.

Hallmarks on Graff Pieces

As a British house, Graff pieces may carry:

British hallmarks:

• Leopard head (London assay)
• Crown (Birmingham)
• Date letter (year of hallmarking)
• Metal fineness (950 for platinum, 750 for gold)
• Maker's mark (Graff's registered mark)

International pieces:

• May have marks from other assay offices
• Or rely on Graff signature + metal mark

Note: Graff sells globally. Mark conventions vary by destination market.

Graff Construction Quality

What defines Graff work:

Settings designed for light: Metal minimized to maximize diamond visibility Platinum preference: For important pieces, platinum is standard Engineering for scale: Large stones require different structural approaches Precision matching: Multi-stone pieces have exceptional stone consistency Movement elements: Articulated pieces (butterflies) function smoothly

What to examine:

• Light return from diamonds (should be exceptional)
• Setting security (prongs properly formed)
• Metal finishing (clean, professional)
• Movement function (articulated pieces)

Red Flags for Graff

Diamond quality issues:

• Mediocre stones in "important" pieces
• Poor cut quality (stones look dead)
• Inconsistent matching in sets
• Missing or unmatched GIA papers

Signature problems:

• Poor engraving quality
• Wrong format
• Missing serial numbers on contemporary pieces
• Signatures in unusual locations

Construction issues:

• Visible tool marks
• Rough finishing
• Settings that don't maximize light return
• Poor articulation on movement pieces

Design issues:

• Designs that look more "fashion" than "high jewelry"
• Lightweight feel when pieces should be substantial
• Proportions that don't match known Graff pieces

The GIA Connection

Graff works closely with GIA. For significant pieces:

What to expect:

• GIA diamond grading report for major stones
• Report number may be laser-inscribed on diamond
• Report details should match the stone exactly

Verification:

• GIA reports can be verified on gia.edu
• Report number, measurements, and characteristics should match
• If inscribed, verify inscription under magnification

When papers matter: For any Graff piece with a significant center stone, GIA certification is expected. Missing papers on a major piece is a significant concern.

Graff Pricing Reality

Graff pricing is diamond-driven:

The reality: Graff doesn't make affordable jewelry. If a "Graff" piece seems cheap, it's fake or misrepresented.

Secondary market: Graff retains value well because the diamonds hold value. But expect typical secondary market discounts on contemporary pieces.

Common Authentication Mistakes

Mistake 1: Ignoring the diamonds

With Graff, diamond quality is part of authentication. Exceptional stones support authenticity; mediocre stones undermine it.

Mistake 2: Expecting heritage hallmarks

Graff isn't a French house. Don't look for eagle heads. Look for British marks and modern conventions.

Mistake 3: Missing the vertical integration

Graff controls their stones from rough to retail. They know their diamonds. If a stone doesn't match their records, that's a problem.

Mistake 4: Underestimating craftsmanship

Just because Graff focuses on diamonds doesn't mean the metalwork is secondary. Settings should be exceptional.

Graff vs. Other Major Houses

vs. Harry Winston: Similar diamond focus, but Winston is American (now Swatch Group), Graff is British. Winston has longer history. Both prioritize exceptional stones.

vs. Cartier: Completely different. Cartier is design heritage; Graff is diamond supremacy. Cartier pieces are iconic for shape; Graff pieces are exceptional for stones.

vs. Leviev: Similar focus on important diamonds, but different market positioning. Both known for significant stones.

Frequently Asked Questions

Are Graff fakes common? Less common than Cartier because Graff's price point is higher and market is smaller. But high-value fakes exist.

Will Graff authenticate pieces? Boutiques can verify pieces, especially with serial numbers and purchase records. They maintain client records.

Why does Graff use platinum? Platinum is stronger and doesn't interfere with diamond color perception. For D-F color diamonds (Graff's standard), platinum is the appropriate metal.

Is Graff a good investment? The diamonds may hold value better than fashion jewelry. But don't buy jewelry as investment—buy it because you want to wear it.

What makes Graff special? Vertical integration, diamond expertise, and willingness to acquire and cut exceptional stones. They're jewelers who think like diamond dealers.

What Dealers Check

When evaluating Graff:

1. Diamond quality — Exceptional stones? Cut quality? Light performance?
2. GIA certification — Present and matching for significant stones
3. Signature and serial — Proper format, traceable
4. Construction — Settings appropriate for the stones
5. Overall quality — Does it look like $50,000+ jewelry?

Examples from Our Collection

These authenticated Graff pieces from Spectra Fine Jewelry exemplify why Graff is called "The King of Diamonds":

Images courtesy of Spectra Fine Jewelry. All pieces authenticated and available for purchase.

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Related Reading

• How to Authenticate Vintage Jewelry at Home →
• British Hallmarks Explained →

Independent educational resource. Not affiliated with Graff Diamonds.