Round|Natural|GIA

0.40ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 1519021693

Certificate GIA 1519021693

Diamond specifications and retailer prices

From £272 GBP
₹34,694 INR
As of October 30, 2026
Save £593 GBP (69%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £1,432 GBP at NZ Jewellers · As of September 24, 2026
View at NZ Jewellers

About this 0.4ct natural round diamond

This 0.4ct natural round sits in the sub-half-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1519021693. Listed at 21 retailers as of October 26, 2026, with a 218% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 1519021693
Dimensions4.76 × 4.74 × 2.92 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Key to symbols
Twinning Wisp
Top View
4.76 mm4.74 mm0.40 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1519021693
Side View
Table 57.0%Crown 34.5°Girdle: MediumPavilion 41.2°Culet: NoneDepth 61.4%

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: £1,432 GBP|Low: £270 GBP|High: £1,432 GBP|Avg: £544 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 6£272 GBP
Retailer 12£374 GBP
Retailer 9£377 GBP
Retailer 3£402 GBP
Retailer 4£402 GBP
Retailer 2£465 GBP
Retailer 7£509 GBP
Retailer 10£526 GBP
Retailer 11£562 GBP
Retailer 5£579 GBP
Retailer 8£864 GBP
NZ Jewellers£1,432 GBP

33 data points across 12 retailers

21 retailers£272 GBP to £864 GBP

A
Cheapest Retailer
-
£272 GBP
₹34,694 INR
B+
Retailer 2
-
£354 GBP
$474 USD
View
Retailer 3
-
£374 GBP
$501 USD
View
Price last confirmed 36 days ago
B+
Retailer 4
-
£374 GBP
$501 USD
View
Retailer 5
-
£377 GBP
$505 USD
View
Price last confirmed 9 days ago
B+
Retailer 6
-
£390 GBP
SGD 706 SGD
View
B
Retailer 7
-
£402 GBP
$539 USD
View
B
Retailer 8
-
£402 GBP
$539 USD
View
Retailer 9
-
£431 GBP
$578 USD
View
Price last confirmed 39 days ago
B
Retailer 10
-
£465 GBP
View
B
Retailer 11
-
£472 GBP
$632 USD
View
B
Retailer 12
-
£508 GBP
$680 USD
View
B
Retailer 13
-
£509 GBP
€649 EUR
View
Retailer 14
-
£512 GBP
$686 USD
View
Price last confirmed 7 days ago
B
Retailer 15
-
£525 GBP
$703 USD
View
B
Retailer 16
-
£526 GBP
$705 USD
View
Retailer 17
-
£562 GBP
A$1,158 AUD
View
Price last confirmed 27 days ago
B
Retailer 18
-
£579 GBP
ZAR 12,543 ZAR
View
B
Retailer 19
-
£864 GBP
View
Retailer 20
-
£1,432 GBP
$1,919 USD
View
Price under review
Most Expensive
NZ Jewellers
a447cac8-4a83-4c83-9723-810f02c6a6a6 · Sep 24
£1,432 GBP
$1,919 USD
View
Price under review
20 more retailers have this diamond
Prices start from £272 GBPSave up to £593 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
0.40ct Round
£272 GBP