Round|Natural|GIA

0.30ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 7478044614

Certificate GIA 7478044614

Diamond specifications and retailer prices

From £213 GBP
$285 USD
As of October 28, 2026
Save £498 GBP (70%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £901 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 7478044614. Listed at 19 retailers as of October 28, 2026, with a 234% 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
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 7478044614
Dimensions4.29 × 4.27 × 2.62 mm
L/W Ratio1.00
Star length45%
Lower girdle75%
Top View
4.29 mm4.27 mm0.30 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7478044614
Side View
Table 59.0%Crown 35.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.3%

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 28
Current: £364 GBP|Low: £251 GBP|High: £549 GBP|Avg: £384 GBP|+1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 7£251 GBP
Retailer 3£300 GBP
Retailer 1£364 GBP
Retailer 6£376 GBP
Retailer 4£393 GBP
Retailer 2£477 GBP
Retailer 5£546 GBP

37 data points across 7 retailers

19 retailers£213 GBP to £711 GBP

A
Cheapest Retailer
-
£213 GBP
$285 USD
A
Retailer 2
-
£222 GBP
$297 USD
View
Retailer 3
-
£225 GBP
$301 USD
View
Price last confirmed 44 days ago
B+
Retailer 4
-
£229 GBP
$307 USD
View
B+
Retailer 5
-
£237 GBP
$318 USD
View
B+
Retailer 6
-
£246 GBP
$330 USD
View
B+
Retailer 7
-
£267 GBP
$357 USD
View
B+
Retailer 8
-
£282 GBP
$378 USD
View
B+
Retailer 9
-
£287 GBP
$384 USD
View
B
Retailer 10
-
£300 GBP
View
B
Retailer 11
-
£304 GBP
$408 USD
View
B+
Retailer 12
-
£310 GBP
$416 USD
View
B
Retailer 13
-
£364 GBP
ZAR 7,884 ZAR
View
Retailer 14
-
£376 GBP
A$776 AUD
View
Price last confirmed 27 days ago
B
Retailer 15
-
£393 GBP
€501 EUR
View
B
Retailer 16
-
£477 GBP
View
B
Retailer 17
-
£546 GBP
View
B
Retailer 18
-
£711 GBP
CA$1,323 CAD
View
Most Expensive
NZ Jewellers
ad9006a4-52cd-4368-908c-5c84af0fb9fd · Oct 29
£901 GBP
$1,207 USD
View
Price under review
18 more retailers have this diamond
Prices start from £213 GBPSave up to £498 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
£213 GBP