Round|Natural|GIA

0.30ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2407403371

Certificate GIA 2407403371

Diamond specifications and retailer prices

From £143 GBP
₹18,301 INR
As of October 30, 2026
Save £331 GBP (70%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £926 GBP at NZ Jewellers · As of October 29, 2026
View at NZ Jewellers

About this 0.3ct natural round diamond

This 0.3ct 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 2407403371. Listed at 20 retailers as of October 29, 2026, with a 231% 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

0.30
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
Crown angle32.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2407403371
Dimensions4.36 × 4.34 × 2.58 mm
L/W Ratio1.00
Top View
4.36 mm4.34 mm0.30 ctJ / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2407403371
Side View
Table 60.0%Crown 32.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 59.3%

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: £143 GBP|Low: £143 GBP|High: £478 GBP|Avg: £302 GBP|-2.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 1£143 GBP
Retailer 7£215 GBP
Retailer 3£258 GBP
Retailer 2£317 GBP
Retailer 6£328 GBP
Retailer 5£345 GBP
Retailer 8£360 GBP
Retailer 4£475 GBP

38 data points across 8 retailers

20 retailers£143 GBP to £475 GBP

A
Cheapest Retailer
-
£143 GBP
₹18,301 INR
B+
Retailer 2
-
£204 GBP
$274 USD
View
Retailer 3
-
£204 GBP
$274 USD
View
Price last confirmed 37 days ago
Retailer 4
-
£216 GBP
$290 USD
View
Price last confirmed 40 days ago
B+
Retailer 5
-
£216 GBP
SGD 392 SGD
View
B+
Retailer 6
-
£220 GBP
$295 USD
View
B+
Retailer 7
-
£228 GBP
$306 USD
View
B+
Retailer 8
-
£236 GBP
$316 USD
View
B+
Retailer 9
-
£238 GBP
A$491 AUD
View
B+
Retailer 10
-
£258 GBP
View
Retailer 11
-
£275 GBP
$369 USD
View
Price last confirmed 39 days ago
B
Retailer 12
-
£302 GBP
$404 USD
View
B
Retailer 13
-
£304 GBP
$407 USD
View
B+
Retailer 14
-
£317 GBP
ZAR 6,861 ZAR
View
B
Retailer 15
-
£324 GBP
View
Retailer 16
-
£328 GBP
A$675 AUD
View
Price last confirmed 27 days ago
B
Retailer 17
-
£360 GBP
$482 USD
View
B
Retailer 18
-
£475 GBP
View
Retailer 19
-
£926 GBP
$1,241 USD
View
Price under review
Most Expensive
NZ Jewellers
d99bd1a5-4a68-43e7-a228-860f0fc8039e · Oct 29
£926 GBP
$1,241 USD
View
Price under review
19 more retailers have this diamond
Prices start from £143 GBPSave up to £331 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
0.30ct Round
£143 GBP