Pre-owned luxury,
Authentically verified.
IGI authentication provides independent grading and clearer certification context for eligible items.
List with confidence. Strengthen trust.
Pre-owned luxury,
Why should you Pre-Authenticate?
Build trust with clearer certification
Luxury jewelry pieces carry high value as well as emotional significance. Pre-authentication gives the pieces you intend to sell trusted certification before listing. - Authenticate to strengthen your listing credibility.
- Build trust with right certification
- Guided authentication support
- Hassle-free authentication and shipping
1,000+
Verified reviews
10,000+
Authenticated items
2,500
Sales Processed
How does pre-authentication work?
Cost to pre-authenticate your jewelry
From IGI authentication to secure shipping, GEMGEM handles the process end-to-end — so your item is listed with clearer certification context.
Sell & get rebated
Pay $199
For the Item Price Less than $5K
Pay $239
For the Item Price Estimate between $5K - $15K
Pay $279
For the Item Price Estimate between $15K - $25K
Pay $369
For the Item Price Estimate between $25K - $200K
Trustscore 4.8 | 12,500+ Reviews
Verified Company
97%
satisfied customers10,000+
Authenticated items10 minutes of your time
List your jewelry within minutes with a guided, transparent process.
Certification
Already certified? Move straight to listing.
High-Quality Photos
Capture clear catalogue and lifestyle shots of your gem.
Ruler
Measure your item accurately to begin the listing process.
Sell. Authenticate. Buy
Review the process for pre-owned jewelry and get help at every step.
Authenticity Guaranteed
IGI Authentication
48-Hour Buyer Review
Insured Delivery
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