Round|Natural|GIA

0.40ct J SI1 Round Natural Diamond

VG • J/SI1 • GIA 7383204720

Certificate GIA 7383204720

Diamond specifications and retailer prices

From £182 GBP
HK$1,900 HKD
As of October 30, 2026
Save £763 GBP (81%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £944 GBP at NZ Jewellers · As of October 30, 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 very-good cut grade and certified by GIA 7383204720. Listed at 18 retailers as of October 30, 2026, with prices from £182 to £944, a £763 spread on the same certified stone. NZ Jewellers lists it at £944. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.40
Carat
J
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
Crown angle32.5°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 7383204720
Dimensions4.74 × 4.68 × 2.90 mm
L/W Ratio1.01
Star length45%
Lower girdle75%
Top View
4.74 mm4.68 mm0.40 ctJ / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateGIA 7383204720
Side View
Table 59.0%Crown 32.5°Girdle: THN-THKPavilion 41.4°Culet: NoneDepth 61.6%

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: £264 GBP|Low: £182 GBP|High: £487 GBP|Avg: £297 GBP|+6.3%
Retailer 1
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 4£182 GBP
Retailer 8£216 GBP
Retailer 12£220 GBP
Retailer 10£257 GBP
Retailer 9£257 GBP
Retailer 1£264 GBP
Retailer 3£282 GBP
Retailer 6£323 GBP
Retailer 11£334 GBP
Retailer 5£354 GBP
Retailer 2£360 GBP
Retailer 7£484 GBP

44 data points across 12 retailers

18 retailers£182 GBP to £944 GBP

A
Cheapest Retailer
-
£182 GBP
HK$1,900 HKD
B+
Retailer 2
-
£208 GBP
$279 USD
View
Retailer 3
-
£216 GBP
$290 USD
View
Price last confirmed 9 days ago
B+
Retailer 4
-
£222 GBP
SGD 402 SGD
View
B+
Retailer 5
-
£225 GBP
$301 USD
View
B+
Retailer 6
-
£233 GBP
$312 USD
View
B+
Retailer 7
-
£257 GBP
$344 USD
View
B+
Retailer 8
-
£257 GBP
$345 USD
View
B+
Retailer 9
-
£264 GBP
View
B+
Retailer 10
-
£281 GBP
$376 USD
View
B+
Retailer 11
-
£282 GBP
$377 USD
View
B+
Retailer 12
-
£306 GBP
$410 USD
View
B+
Retailer 13
-
£323 GBP
ZAR 6,996 ZAR
View
Retailer 14
-
£334 GBP
A$688 AUD
View
Price last confirmed 27 days ago
B+
Retailer 15
-
£354 GBP
€452 EUR
View
B
Retailer 16
-
£360 GBP
$482 USD
View
B
Retailer 17
-
£484 GBP
View
Most Expensive
C
NZ Jewellers
2a665f7e-3b1f-4e63-9573-ba74aa8ed566 · Oct 30
£944 GBP
$1,265 USD
View
17 more retailers have this diamond
Prices start from £182 GBPSave up to £763 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
£182 GBP