In jewelry, trust is the primary purchase factor - and AI agents know it. ChatGPT Shopping and Perplexity seek to verify hallmark (750/925), stone certification (GIA, IGI, HRD), and care conditions before recommending jewelry. The jewelry industry has a critical urgency on hallmark: without this data in schema.org, your product loses the industry's #1 trust signal.
01 · The checklist
The data engines look for on a jewelry product page
Excerpts from the sector checklist, ranked by weight: what blocks a recommendation when missing, then what reinforces trust. The full audit covers 149 checks.
Required content
Industry-specific audit zones
Poinçon, titre métal (or 18K/750, argent 925) visible HTML sur PDP
Certification pierres (GIA, IGI, HRD) ou composition visible sur PDP
Instructions d'entretien et de stockage accessibles depuis PDP
Option gravure, personnalisation ou livraison cadeau visible près du bouton d’achat
Trust signals
Expected UX patterns
Real-time custom engraving preview on the product
Virtual ring sizer to determine ring size
02 · Industry benchmarks
Reference values for a jewelry page
Internal reference valuesPer-sector reference targets defined by Verity Score, not measured on a sample of stores.
03 · Required schema.org
The markup engines can read
Copy the structure and adapt the values to your pages.
"additionalProperty": [{"@type": "PropertyValue", "name": "Hallmark", "value": "750 (18K Gold)"}]05 · Frequent questions
Your questions about AI engines
Why is hallmark a critical urgency in GEO?
Hallmark (18K Gold/750, Sterling Silver 925) is the #1 trust signal in jewelry. AI agents consider it mandatory to recommend jewelry. Without additionalProperty name='Hallmark' value='750 (18K Gold)', your product is filtered.
How do I expose stone certification?
Add additionalProperty name='Stone Certification' value='GIA Certified' in schema.org Product. AI agents extract this for queries like 'GIA certified diamond ring'.
Is custom engraving detected by AI?
Yes. The audit evaluates engraving or customization options near CTA. It's a strong positive signal that differentiates your store from competitors.
Do care instructions matter?
Yes. The audit checks care and storage instructions accessibility from PDP. AI agents extract them to answer usage queries.
What jewelry-specific zones does Verity Score analyze?
hallmark and metal purity (critical urgency), stone certification, care and storage, engraving and customization. Plus 39+ cross-industry zones.
How do I structure the natural vs lab-grown diamond distinction for AI in 2026?
It became central in 2026. Since October 1, 2025, GIA no longer issues 4C (color/clarity) grades for lab-grown diamonds but a two-tier report ('premium'/'standard'), and HRD Antwerp stopped certifying loose lab-grown stones in 2026. On the natural side, traceability is advancing : GIA took a 30% stake in De Beers' Tracr blockchain platform (2026). Note : there is no new 2026 FTC rule on lab-grown diamonds, the Jewelry Guides date from 2018. Structure stone type (natural/lab-grown), certifying lab, and provenance in additionalProperty : AI agents filter on these distinctions.
Get your Jewelry store audited
The Shopify app is in private beta. It analyzes your Jewelry store across 149 checks in 39+ zones, in 60 seconds, and gives you the fixes to make.
Request beta access