Free protection

A certificate can be real. The seller's story may not be.

KimeGem helps expose when the same grading report number is claimed by more than one seller or owner. Register yours, build trust, and get alerted when another claim appears.

Protect my report number See why this matters

Freeduplicate alerts

24hverification target

Encryptedprivate evidence

Certificate identityGIA 7448 9210 318MONITORED

Current protectionT2 Ownership-backed

2,556Report numbers protected

34Conflicts found

21Impacted owners

The gap certificates cannot close

One genuine number. Three convincing copies.

A grading report identifies diamond characteristics. It cannot prevent someone from copying that identity into another listing, card, or sale.

Original recordGIA 7448 9210 318Certificate number exists

NUMBER COPIED

SELLER ASame reportListing claim

SELLER BSame reportInvoice claim

SELLER CSame reportMarketplace claim

The certificate may be genuine. The repeated ownership stories cannot all be.

A trust score built on evidence

Every claim starts at zero. Evidence moves it forward.

T0Lab verified

Start with the report number

Scan or type a GIA, IGI, GCAL, GSI, or GSL report number. We check it against the grading authority within 24 hours. Until that check clears, the entry is pending and is not matched against anyone.

Authority record confirmed

T1Card verified

Photograph the lab card

Take one camera photo of the physical grading card. A reviewer confirms the card belongs to the same report, which lifts the entry to T1.

Physical card confirmed

T2Ownership verified

Add proof of ownership

Photograph the purchase invoice and up to three images of the jewellery. T2 is the highest trust score on KimeGem.

Ownership evidence confirmed

The moment KimeGem matters

Someone else just claimed your number.

Choose how strong a rival claim must be before KimeGem alerts you. Anyone can type in a number they merely saw somewhere, so that alone is never treated as a conflict — only counted. An alert means someone has actually shown evidence: a verified card (Medium trust) or proof of ownership (High trust).

T1 Recommended — notify me once their grading card reaches Medium trust
T2 Quietest — notify me only once their ownership evidence reaches High trust
T0 Every entry, even with no evidence — not recommended, can be noisy

9:41KimeGem

KOwnership conflict detectednow

A second claim for GIA •••• 0318 has reached T2.

Review conflict

Your evidence remains encrypted

IMPORTANT

What KimeGem does and does not do

We reveal conflicting claims. We do not authenticate diamonds.

KimeGem is not a grading laboratory, appraiser, insurer, or legal authority. It provides an early warning that a certificate identity may have been reused, so owners and buyers can investigate with the seller, marketplace, insurer, or grading lab.

Community-powered protection

Every registered number makes copied identities harder to hide.

The registry grows stronger when more owners participate. Registration and alerts are free, and uploaded evidence is stored encrypted.