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Round|Natural|GIA

3.40ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 6431989398

Certificate GIA 6431989398

Diamond specifications and retailer prices

From $30,156 USD
As of October 29, 2026
Save $7,461 USD (20%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $37,617 USD at 77 Diamonds · As of October 30, 2026
View at 77 Diamonds

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 6431989398. Listed at 4 retailers as of October 29, 2026, with prices from $30,156 to $37,617, a $7,461 spread on the same certified stone. 77 Diamonds lists it at $37,617. 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
Crown angle35.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6431989398
Dimensions9.64 × 9.59 × 5.94 mm
L/W Ratio1.01
Top View
9.64 mm9.59 mm3.40 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6431989398
Side View
Table 56.0%Crown 35.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.9%

Caratlytics Score

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

Price History

Last verified: Oct 29
Current: $37,617 USD|Low: $30,156 USD|High: $39,628 USD|Avg: $34,415 USD|-2.8%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
October 30, 2026
Retailer 3$30,156 USD
Retailer 4$30,838 USD
Retailer 2$32,314 USD
77 Diamonds$37,617 USD

37 data points across 4 retailers

4 retailers$30,156 USD to $37,617 USD

B+
Cheapest Retailer
-
$30,156 USD
B+
Retailer 2
-
$30,838 USD
View
B
Retailer 3
-
$32,314 USD
View
Most Expensive
B
77 Diamonds
RBZKJYCD5HV · Oct 30
$37,617 USD
£29,619 GBP
View
3 more retailers have this diamond
Prices start from $30,156 USDSave up to $7,461 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+
3.40ct Round
$30,156 USD