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Round|Natural|GIA

0.30ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2557240411

Certificate GIA 2557240411

Diamond specifications and retailer prices

From £120 GBP
₹15,262 INR
As of October 29, 2026
Save £641 GBP (84%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £761 GBP at NZ Jewellers · As of October 26, 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 2557240411. Listed at 21 retailers as of October 26, 2026, with prices from £120 to £761, a £641 spread on the same certified stone. NZ Jewellers lists it at £761. 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
FluorescenceFaint
Crown angle33.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2557240411
Dimensions4.34 × 4.37 × 2.63 mm
L/W Ratio1.01
Key to symbols
Crystal, Cloud
Top View
4.34 mm4.37 mm0.30 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2557240411
Side View
Table 60.0%Crown 33.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 60.5%

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 29
Current: £761 GBP|Low: £119 GBP|High: £802 GBP|Avg: £267 GBP|-5.2%
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
Retailer 19
October 29, 2026
Retailer 12£120 GBP
Retailer 11£153 GBP
Retailer 9£169 GBP
Retailer 10£181 GBP
Retailer 13£183 GBP
Retailer 3£184 GBP
Retailer 8£189 GBP
Retailer 19£206 GBP
Retailer 18£213 GBP
Retailer 4£226 GBP
Retailer 2£257 GBP
Retailer 17£259 GBP
Retailer 6£262 GBP
Retailer 7£267 GBP
Retailer 16£299 GBP
Retailer 5£323 GBP
Retailer 14£345 GBP
Retailer 15£393 GBP
NZ Jewellers£761 GBP

16 data points across 19 retailers

21 retailers£120 GBP to £761 GBP

A
Cheapest Retailer
-
£120 GBP
₹15,262 INR
A
Retailer 2
-
£153 GBP
HK$1,600 HKD
View
A
Retailer 3
-
£169 GBP
$227 USD
View
A
Retailer 4
-
£181 GBP
$242 USD
View
A
Retailer 5
-
£183 GBP
$245 USD
View
A
Retailer 6
-
£184 GBP
SGD 333 SGD
View
A
Retailer 7
-
£189 GBP
$253 USD
View
A
Retailer 8
-
£206 GBP
$276 USD
View
Retailer 9
-
£209 GBP
$280 USD
View
Price last confirmed 30 days ago
A
Retailer 10
-
£213 GBP
A$438 AUD
View
A
Retailer 11
-
£226 GBP
$303 USD
View
B+
Retailer 12
-
£257 GBP
View
B+
Retailer 13
-
£259 GBP
$347 USD
View
B+
Retailer 14
-
£262 GBP
ZAR 5,676 ZAR
View
B+
Retailer 15
-
£267 GBP
$357 USD
View
B+
Retailer 16
-
£299 GBP
€381 EUR
View
B+
Retailer 17
-
£323 GBP
$433 USD
View
B+
Retailer 18
-
£345 GBP
View
Retailer 19
-
£367 GBP
A$756 AUD
View
Price last confirmed 26 days ago
B
Retailer 20
-
£393 GBP
View
Most Expensive
B
NZ Jewellers
7b8de99c-d9d9-4c07-962a-4c086db14888 · Oct 26
£761 GBP
$1,019 USD
View
20 more retailers have this diamond
Prices start from £120 GBPSave up to £641 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
£120 GBP