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Round|Natural|GIA

3.12ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 7521700205

Certificate GIA 7521700205

Diamond specifications and retailer prices

From £17,671 GBP
CA$32,885 CAD
As of October 30, 2026
Save £11,516 GBP (39%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £29,187 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 3.12ct natural round diamond

This 3.12ct natural round sits in the three to five carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7521700205. Listed at 16 retailers as of October 29, 2026, with prices from £17,671 to £29,187, a £11,516 spread on the same certified stone. MOH London lists it at £29,187. 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

3.12
Carat
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 7521700205
Dimensions9.31 × 9.39 × 5.83 mm
L/W Ratio1.01
Star length45%
Lower girdle75%
Girdle conditionFaceted
Culet sizeNone
Cert comments
Additional clouds are not shown. Pinpoints are not shown.
Key to symbols
Feather, Crystal, Knot, Cloud, Needle, Natural
Top View
9.31 mm9.39 mm3.12 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7521700205
Side View
Table 59.0%Crown 34.5°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 62.3%

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: £29,187 GBP|Low: £17,671 GBP|High: £29,876 GBP|Avg: £21,207 GBP|-2.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 30, 2026
Retailer 2£17,671 GBP
Retailer 3£17,781 GBP
Retailer 9£18,890 GBP
Retailer 8£18,938 GBP
Retailer 4£19,358 GBP
Retailer 10£19,646 GBP
Retailer 5£19,964 GBP
Retailer 6£19,964 GBP
Retailer 12£20,629 GBP
Retailer 11£21,913 GBP
Retailer 7£22,061 GBP
Retailer 13£22,109 GBP
Retailer 14£26,334 GBP
MOH London£29,187 GBP

31 data points across 14 retailers

16 retailers£17,671 GBP to £29,187 GBP

B+
Cheapest Retailer
-
£17,671 GBP
CA$32,885 CAD
B+
Retailer 2
-
£17,781 GBP
$23,825 USD
View
B+
Retailer 3
-
£18,890 GBP
$25,311 USD
View
B+
Retailer 4
-
£18,938 GBP
View
B+
Retailer 5
-
£19,358 GBP
$25,938 USD
View
B+
Retailer 6
-
£19,646 GBP
$26,323 USD
View
Retailer 7
-
£19,689 GBP
$26,381 USD
View
Price last confirmed 34 days ago
B+
Retailer 8
-
£19,964 GBP
$26,750 USD
View
B+
Retailer 9
-
£19,964 GBP
$26,750 USD
View
B+
Retailer 10
-
£20,629 GBP
$27,640 USD
View
B+
Retailer 11
-
£20,797 GBP
CA$38,703 CAD
View
B
Retailer 12
-
£21,913 GBP
$29,361 USD
View
B
Retailer 13
-
£22,061 GBP
€28,152 EUR
View
B
Retailer 14
-
£22,109 GBP
$29,624 USD
View
B
Retailer 15
-
£26,334 GBP
$35,285 USD
View
Most Expensive
B
MOH London
CD8E8B023 · Oct 29
£29,187 GBP
View
15 more retailers have this diamond
Prices start from £17,671 GBPSave up to £11,516 GBP

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+
3.12ct Round
£17,671 GBP