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Round|Natural|GIA

5.12ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 2517218278

Certificate GIA 2517218278

Diamond specifications and retailer prices

From $65,013 USD
CA$90,296 CAD
As of October 30, 2026
Save $44,237 USD (40%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $109,250 USD at MOH London · As of November 1, 2026
View at MOH London

About this 5.12ct natural round diamond

This 5.12ct natural round sits in the over five carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2517218278. Listed at 6 retailers as of October 30, 2026, with prices from $65,013 to $109,250, a $44,237 spread on the same certified stone. MOH London lists it at $109,250. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

5.12
Carat
J
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2517218278
Dimensions10.97 × 11.01 × 6.88 mm
L/W Ratio1.00
Top View
10.97 mm11.01 mm5.12 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2517218278
Side View
Table 55.0%Crown 35.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $109,250 USD|Low: $65,013 USD|High: $110,566 USD|Avg: $77,049 USD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 6$65,013 USD
Retailer 7$66,049 USD
Retailer 3$68,972 USD
Retailer 4$70,969 USD
Retailer 5$73,549 USD
Retailer 2$84,503 USD
MOH London$109,250 USD

38 data points across 7 retailers

6 retailers$65,013 USD to $109,250 USD

B+
Cheapest Retailer
-
$65,013 USD
CA$90,296 CAD
B+
Retailer 2
-
$68,972 USD
£54,309 GBP
View
B+
Retailer 3
-
$70,969 USD
View
B+
Retailer 4
-
$73,549 USD
View
B
Retailer 5
-
$84,503 USD
€80,479 EUR
View
Most Expensive
B
MOH London
28699F27C · Nov 1
$109,250 USD
£86,024 GBP
View
5 more retailers have this diamond
Prices start from $65,013 USDSave up to $44,237 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B+
5.12ct Round
$65,013 USD