About Signed Vintage Jewelry
This site exists because authentication matters—and because most resources on the topic are either too basic to be useful or written to sell you something specific.
We're different.
What This Site Is
An educational resource. We publish what we know about authenticating signed jewelry from major houses: Cartier, Van Cleef & Arpels, Tiffany, Bulgari, David Webb, and others.
Practical, not theoretical. Everything here comes from hands-on experience with real pieces. Not academic research divorced from market reality. See our authentication process for the actual methods we use.
Independent. We're not paid by any brand to promote their products. We're not an auction house writing catalog entries. We call it like we see it.
Connected to expertise. This site is an initiative of Spectra Fine Jewelry, Diamond District dealers who handle signed pieces daily.
Why We Built This
The secondary market for signed jewelry is full of problems:
Fakes are everywhere. Some obvious, some sophisticated enough to fool casual observers. We cover the most commonly faked brands and what to watch for.
Information is fragmented. Good information exists, but it's scattered across auction catalogs, collector forums, and dealer knowledge that doesn't get shared.
Buyers are at a disadvantage. The seller knows more about the piece than the buyer. That imbalance leads to expensive mistakes.
Most "guides" are worthless. Generic advice like "check for quality" doesn't help anyone.
We built this site to fix that. Real information, practical guidance, freely available. Start here if you're new to collecting.
Who We Are
This site is produced by Spectra Fine Jewelry, established Diamond District dealers specializing in signed and estate jewelry.
What we do:
- Buy, sell, and authenticate signed jewelry
- Work with collectors, estate attorneys, and auction houses
- Handle pieces from Cartier, Van Cleef, Tiffany, Bulgari, David Webb, Harry Winston, Boucheron, and other major houses
- Provide authentication consultations
Our perspective: We see pieces every day. Real ones and fake ones. We know what authentic construction looks like because we handle it constantly. That experience informs everything on this site.
Our Approach to Authentication
No single factor proves authenticity. Serial numbers can be faked. Boxes can be bought. Hallmarks can be added. Authentication requires evaluating the complete picture.
Construction tells the story. How a piece was made matters more than what's written on it. Quality houses have quality standards. Those standards show in the metalwork, the settings, the finishing, the weight.
Experience matters. You develop an eye for this. After handling thousands of pieces, you know when something looks right and when something looks wrong—often before you can articulate why.
Humility is essential. We don't know everything. Counterfeiters get better. Edge cases exist. When we're uncertain, we say so.
What We Publish
Authentication guides. Brand-specific guidance for Cartier, Van Cleef, Tiffany, and others.
Hallmark references. French, British, Italian, and other hallmarking systems explained. Start with our complete hallmarks guide.
Educational content. Blog posts diving deep into specific topics, fakes, and market dynamics.
Practical tools. Glossaries, checklists, and reference materials collectors can use.
Our Standards
We don't make stuff up. If we don't know something, we say so or we don't publish on the topic.
We cite our sources when relevant. Assay office documentation, auction records, and standard industry references inform our content.
We update when needed. Markets change. Fakes evolve. We revise content to stay current.
We acknowledge limitations. No guide replaces hands-on examination. Photos have limits. Some pieces require expert evaluation.
Independence and Connection
This site is editorially independent. We write what we believe is true, not what sells inventory.
At the same time, we're connected to Spectra Fine Jewelry. That connection means:
- Access to real pieces for reference
- Daily experience that informs content
- Ability to help readers who need direct assistance
We link to Spectra as a resource for readers looking for authenticated pieces or expert consultation. That's our business. But the educational content stands on its own.
How to Use This Site
Researching a purchase? Start with the brand guide for the piece you're considering.
Learning to authenticate? Read the hallmark pages and blog posts to build foundational knowledge.
Evaluating a specific piece? Use our authentication checklist as a guide, then contact us if you need direct help.
Building a collection? Browse our educational content to develop your eye and avoid common mistakes. Our start here guide walks you through the learning journey.
Contact
Have questions about a piece? Need authentication help? Want to sell something?
Contact Spectra Fine Jewelry →
We respond to inquiries and are happy to look at photos of pieces you're evaluating.
Diamond District Credibility
The Diamond District in New York City is one of the world's largest jewelry trading centers. Dealers here see more signed jewelry—authentic and fake—than almost anywhere else.
That concentration of market activity creates expertise. When you've seen thousands of Cartier pieces, you know what they're supposed to look like. When you've caught dozens of sophisticated fakes, you know what to look for.
This site draws on that experience. Not armchair theorizing—practical knowledge from active market participation.
Signed Vintage Jewelry is an educational initiative of Spectra Fine Jewelry. Independent information for collectors and buyers navigating the secondary market for signed jewelry.
Need Help?
Send photos of a piece you're evaluating. We'll give you a straight read—no pressure, no BS.
Contact Spectra Fine Jewelry →Ready to Browse Authenticated Pieces?
Every item at Spectra Fine Jewelry goes through our verification process before it hits the case. No guesswork. No surprises.