CaratHunter
Plans
Round|Natural|GIA

3.40ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 1242049742

Certificate GIA 1242049742

Diamond specifications and retailer prices

From £13,642 GBP
HK$142,800 HKD
As of October 30, 2026
Save £11,964 GBP (47%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £25,606 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 3.4ct natural round diamond

This 3.4ct 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 1242049742. Listed at 9 retailers as of October 29, 2026, with prices from £13,642 to £25,606, a £11,964 spread on the same certified stone. MOH London lists it at £25,606. 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

3.40
Carat
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1242049742
Dimensions9.52 × 9.58 × 5.99 mm
L/W Ratio1.01
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
9.52 mm9.58 mm3.40 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1242049742
Side View
Table 56.0%CrownGirdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £25,606 GBP|Low: £13,642 GBP|High: £26,875 GBP|Avg: £18,677 GBP|-4.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 30, 2026
Retailer 2£13,642 GBP
Retailer 5£15,532 GBP
Retailer 4£16,980 GBP
Retailer 6£18,686 GBP
Retailer 3£20,170 GBP
MOH London£25,606 GBP

37 data points across 6 retailers

9 retailers£13,642 GBP to £25,606 GBP

A
Cheapest Retailer
-
£13,642 GBP
HK$142,800 HKD
Retailer 2
-
£15,532 GBP
SGD 28,123 SGD
View
Price last confirmed 18 days ago
A
Retailer 3
-
£16,980 GBP
$22,751 USD
View
B+
Retailer 4
-
£18,686 GBP
A$38,518 AUD
View
Retailer 5
-
£19,304 GBP
$25,865 USD
View
Price last confirmed 15 days ago
Retailer 6
-
£19,709 GBP
$26,408 USD
View
Price last confirmed 12 days ago
B+
Retailer 7
-
£20,170 GBP
€25,739 EUR
View
Retailer 8
-
£23,350 GBP
$31,286 USD
View
Price last confirmed 13 days ago
Most Expensive
B
MOH London
E84C37AC0 · Oct 29
£25,606 GBP
View
8 more retailers have this diamond
Prices start from £13,642 GBPSave up to £11,964 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.

A
3.40ct Round
£13,642 GBP