Oval|Natural|GIA

0.40ct J SI1 Oval Natural Diamond

EX • J/SI1 • GIA 5241055820

Certificate GIA 5241055820

Diamond specifications and retailer prices

From $277 USD
As of October 18, 2026
15 retailers carry this diamond
Most expensive: $1,255 USD at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 0.4ct natural oval diamond

This 0.4ct natural oval sits in the sub-half-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5241055820. Listed at 15 retailers as of October 17, 2026. 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

0.40
Carat
J
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5241055820
Dimensions5.92 × 4.14 × 2.64 mm
L/W Ratio1.43
Culet sizeNone
Key to symbols
Crystal, Feather
Top View
5.92 mm4.14 mm0.40 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5241055820
Side View
Table 61.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 63.8%

Caratlytics Score

No score right now
No retailer has confirmed this stone recently, so we are not scoring it. Prices below are as of the date shown.

Price History

Last verified: Oct 18
Current: $1,255 USD|Low: $277 USD|High: $1,255 USD|Avg: $457 USD
NZ Jewellers
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
October 20, 2026
Retailer 7$277 USD
Retailer 11$280 USD
Retailer 4$293 USD
Retailer 9$298 USD
Retailer 18$309 USD
Retailer 3$320 USD
Retailer 2$335 USD
Retailer 6$373 USD
Retailer 8$407 USD
Retailer 10$411 USD
Retailer 14$429 USD
Retailer 5$439 USD
Retailer 16$444 USD
Retailer 12$474 USD
Retailer 15$505 USD
Retailer 17$567 USD
Retailer 13$643 USD
NZ Jewellers$1,255 USD

35 data points across 18 retailers

15 retailers$277 USD to $1,255 USD

Retailer 1
-
$277 USD
Price last confirmed 12 days ago
Retailer 2
-
$280 USD
View
Price last confirmed 12 days ago
Retailer 3
-
$293 USD
SGD 396 SGD
View
Price last confirmed 11 days ago
Retailer 4
-
$298 USD
View
Price last confirmed 15 days ago
Retailer 5
-
$309 USD
View
Price last confirmed 14 days ago
Retailer 6
-
$320 USD
View
Price last confirmed 12 days ago
Retailer 7
-
$335 USD
£264 GBP
View
Price last confirmed 11 days ago
Retailer 8
-
$371 USD
SGD 502 SGD
View
Price last confirmed 8 days ago
Retailer 9
-
$373 USD
View
Price last confirmed 12 days ago
Retailer 10
-
$407 USD
View
Price last confirmed 12 days ago
Retailer 11
-
$411 USD
View
Price last confirmed 10 days ago
Retailer 12
-
$429 USD
ZAR 6,927 ZAR
View
Price last confirmed 14 days ago
Retailer 13
-
$444 USD
A$683 AUD
View
Price last confirmed 27 days ago
Retailer 14
-
$643 USD
£506 GBP
View
Price last confirmed 12 days ago
Most Expensive
NZ Jewellers
43c0857f-5470-4444-b807-2cbd8a2bfe56 · Oct 17
$1,255 USD
View
Price under review
14 more retailers have this diamond

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.

0.40ct Oval
$277 USD