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How to buy

Every piece. Every detail. Verified.

GEMGEM is a trust-first marketplace for pre-owned fine jewelry and loose natural stones. Our Authenticity Guarantee means every item is made from genuine materials — real gold, real diamonds, real gemstones — as described. For C2C items, IGI authentication confirms the grade and specifications during or before your transaction.

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GEMGEM Buying Journey:

5-Step Process

Browse our collection of pre-owned fine jewelry and loose natural stones. Each listing carries our Authenticity Guarantee. Select your piece, add it to your bag, and proceed to checkout with a fully transparent payment and delivery process.

Every listing on GEMGEM carries our Authenticity Guarantee. Items are either already IGI or GIA certified, or will be authenticated by IGI as part of your transaction. Check the badge on each listing to understand the item’s current authentication status.

01
Browse with confidence

Every listing on GEMGEM carries our Authenticity Guarantee. Items are either already IGI or GIA certified, or will be authenticated by IGI as part of your transaction. Check the badge on each listing to understand the item’s current authentication status.

02
Purchase Securely

Add to bag and proceed to checkout. Depending on the item type, you will pay either the full amount or a 20% deposit. All payments are held in escrow — funds are only released to the seller after delivery and your review window closes.

03
Authentication (where applicable)

For items marked Authentication on Purchase, IGI physically examines and grades the item after your purchase is confirmed. You receive the grading report within approximately 5–7 business days. If the result matches the listing, you pay the balance and the item ships to you. If you do not pay the remaining balance within 48 hours, your deposit may be forfeited. If the item does not pass, you receive a full deposit refund.

04
Delivery and review

Your item arrives fully insured and signature-confirmed. You have 48 hours to inspect it. During this window your payment is still in escrow. If everything is right, funds are released and the transaction completes.

05
Free relist (if needed)

Not what you expected? Relist your item on GEMGEM commission-free. Initiate within 30 days of delivery. Your listing stays active for up to 90 days.

What each badge means

Listing Status Guide

BadgeMeaning
IGI AuthenticatedItem has been physically examined and graded by IGI. Certificate issued. Grade and specifications confirmed.
GIA CertifiedItem carries a certificate from the Gemological Institute of America. Verifiable on the GIA public database.
Authentication on PurchaseSpecifications are seller-stated. IGI authenticates after your purchase. 20% deposit required. Full refund if item does not pass.
Ready to ShipItem is authenticated and all pre-dispatch requirements are met. Allows a short number of business days for logistics.
Fast ShipItem is authenticated and will dispatch within 24 hours of payment confirmation.
Trusted SupplierItem sourced from a verified trade supplier. Not a C2C listing. GEMGEM holds the supplier accountable for accuracy.
Customize Your Experience

At GEMGEM, customization is easy and expertly crafted to enhance your jewelry experience.

Refurbish Your Jewelry
Refurbish Your Jewelry

Exclusively for first-time buyers on GEMGEM: Enjoy a complimentary refurbishment service! Our experts restore your jewelry’s original brilliance and timeless beauty.

Refurbish Your Jewelry
Re-size

Get the perfect fit with our resizing service. We tailor your jewelry to match your style and comfort.

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Buyer Protection Promise

GEMGEM Buyer Protection Promise

Authenticity Guarantee

Every item is covered by GEMGEM's Authenticity Guarantee — real gold, real diamonds, real gemstones, as described.

48-Hour Buyer Review

Your payment is held in escrow for 48 hours after delivery. Funds only release after your review window closes.

Free Relist

Not satisfied? Relist commission-free within 30 days of delivery. Active for up to 90 days.

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Why IGI?

International Gemological Institute

At GEMGEM, trust is our foundation. That’s why we partner with the renowned International Gemological Institute (IGI)—one of the world’s leading independent gemological laboratories for diamonds, gemstones, and jewellery grading.

For C2C items, IGI provides independent gemological grading and physical examination. Eligible pieces are assessed and graded by IGI during or before your transaction, and a full grading report is issued.

For C2C items, IGI physically examines and grades every item during or before your transaction. GIA or IGI certified items from trusted suppliers carry independent certification shown on every listing. Items that do not pass authentication are returned — your deposit is refunded in full.

A Simple Process
How It Works
Order Placement
The seller receives an order from the buyer, marking the beginning of a seamless transaction.
Order Placement
Testimonials

Why GEMGEM Exists

“We created GEMGEM to make buying luxury pre-owned jewelry safe, affordable, and stress-free. Eligible items are independently authenticated under our process. If you decide to relist, you can do so commission-free — initiate within 30 days of delivery, and your listing stays active for up to 90 days. It’s pre-owned luxury — with a transparent process built in.”

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F.A.Q. - Have Questions?

Here are some of the most commonly asked questions from buyers. if you don't see what you're looking for, visit the Help Center for more answers.

The marketplace where fine jewelry holds its value.
Authenticity Guaranteed
IGI Authentication
48-Hour Buyer Review
Insured Delivery
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