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Round|Natural|IGI

0.30ct J I1 Round Natural Diamond

VG • J/I1 • IGI 485142351

Shape and cutting style on the report: Round brilliant

Certificate IGI 485142351

Diamond specifications and retailer prices

From £125 GBP
$167 USD
As of October 31, 2026
Save £440 GBP (78%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £565 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 I1 clarity (included), with a very-good cut grade and certified by IGI 485142351. Listed at 8 retailers as of October 29, 2026, with prices from £125 to £565, a £440 spread on the same certified stone. NZ Jewellers lists it at £565. 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

0.30
Carat
J
Colour
I1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.7°
Pavilion angle40°
OriginNatural
Grading LabIGI
CertificateIGI 485142351
Dimensions4.18 × 4.22 × 2.66 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Cert comments
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Top View
4.18 mm4.22 mm0.30 ctJ / I1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 485142351
Side View
Table 57.0%Crown 36.7°Girdle: STK-THKPavilion 40°Culet: NoneDepth 63.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £227 GBP|Low: £120 GBP|High: £227 GBP|Avg: £173 GBP|+3.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
October 30, 2026
Retailer 2£121 GBP
Retailer 3£158 GBP
Retailer 4£190 GBP
Retailer 1£227 GBP

17 data points across 4 retailers

8 retailers£125 GBP to £565 GBP

B+
Cheapest Retailer
-
£125 GBP
$167 USD
B+
Retailer 2
-
£134 GBP
$180 USD
View
B+
Retailer 3
-
£139 GBP
$186 USD
View
B+
Retailer 4
-
£153 GBP
$205 USD
View
B+
Retailer 5
-
£158 GBP
$211 USD
View
B+
Retailer 6
-
£168 GBP
$225 USD
View
B
Retailer 7
-
£227 GBP
€290 EUR
View
Most Expensive
C
NZ Jewellers
4eeb94c7-c1d7-41ba-ac12-cefdff750e02 · Oct 29
£565 GBP
$757 USD
View
7 more retailers have this diamond
Prices start from £125 GBPSave up to £440 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.

B+
0.30ct Round
£125 GBP