Round|Natural|GIA

3.40ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 1242049742

Certificate GIA 1242049742

Diamond specifications and retailer prices

From $18,278 USD
HK$142,800 HKD
As of October 30, 2026
Save $16,031 USD (47%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $34,309 USD 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 $18,278 to $34,309, a $16,031 spread on the same certified stone. MOH London lists it at $34,309. 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $34,309 USD|Low: $18,278 USD|High: $36,010 USD|Avg: $25,026 USD|-4.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 30, 2026
Retailer 2$18,278 USD
Retailer 5$20,811 USD
Retailer 4$22,751 USD
Retailer 6$25,037 USD
Retailer 3$27,026 USD
MOH London$34,309 USD

37 data points across 6 retailers

9 retailers$18,278 USD to $34,309 USD

A
Cheapest Retailer
-
$18,278 USD
HK$142,800 HKD
Retailer 2
-
$20,811 USD
SGD 28,123 SGD
View
Price last confirmed 18 days ago
A
Retailer 3
-
$22,751 USD
View
B+
Retailer 4
-
$25,037 USD
A$38,518 AUD
View
Retailer 5
-
$25,865 USD
View
Price last confirmed 15 days ago
Retailer 6
-
$26,408 USD
View
Price last confirmed 12 days ago
B+
Retailer 7
-
$27,026 USD
€25,739 EUR
View
Retailer 8
-
$31,286 USD
View
Price last confirmed 13 days ago
Most Expensive
B
MOH London
E84C37AC0 · Oct 29
$34,309 USD
£27,015 GBP
View
8 more retailers have this diamond
Prices start from $18,278 USDSave up to $16,031 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.

A
3.40ct Round
$18,278 USD