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Round|Natural|IGI

1.54ct I SI1 Round Natural Diamond

EX • I/SI1 • IGI 635477973

Shape and cutting style on the report: Round brilliant

Certificate IGI 635477973

Diamond specifications and retailer prices

From £3,712 GBP
$4,974 USD
As of October 30, 2026
Save £2,940 GBP (44%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £7,118 GBP at NZ Jewellers · As of September 25, 2026
View at NZ Jewellers

About this 1.54ct natural round diamond

This 1.54ct natural round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 635477973. Listed at 17 retailers as of October 29, 2026, with a 79% 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

1.54
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabIGI
CertificateIGI 635477973
Dimensions7.44 × 7.36 × 4.56 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
7.44 mm7.36 mm1.54 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 635477973
Side View
Table 60.0%Crown 35.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 61.7%

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: £4,818 GBP|Low: £3,712 GBP|High: £6,696 GBP|Avg: £4,531 GBP|+4.7%
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 30, 2026
Retailer 12£3,712 GBP
Retailer 9£3,735 GBP
Retailer 4£3,812 GBP
Retailer 11£3,978 GBP
Retailer 6£4,206 GBP
Retailer 3£4,256 GBP
Retailer 10£4,256 GBP
Retailer 5£4,285 GBP
Retailer 1£4,818 GBP
Retailer 2£4,911 GBP
Retailer 8£5,183 GBP
Retailer 7£6,652 GBP

40 data points across 12 retailers

17 retailers£3,712 GBP to £6,652 GBP

A
Cheapest Retailer
-
£3,712 GBP
$4,974 USD
Retailer 2
-
£3,735 GBP
$5,005 USD
View
Price last confirmed 14 days ago
A
Retailer 3
-
£3,812 GBP
$5,107 USD
View
A
Retailer 4
-
£3,978 GBP
$5,330 USD
View
B+
Retailer 5
-
£4,206 GBP
View
Retailer 6
-
£4,256 GBP
$5,703 USD
View
Price last confirmed 14 days ago
Retailer 7
-
£4,256 GBP
$5,703 USD
View
Price last confirmed 40 days ago
Retailer 8
-
£4,256 GBP
$5,703 USD
View
Price last confirmed 17 days ago
Retailer 9
-
£4,256 GBP
$5,703 USD
View
Price last confirmed 16 days ago
B+
Retailer 10
-
£4,285 GBP
View
B+
Retailer 11
-
£4,372 GBP
$5,858 USD
View
B+
Retailer 12
-
£4,818 GBP
€6,148 EUR
View
Retailer 13
-
£4,911 GBP
$6,580 USD
View
Price last confirmed 40 days ago
Retailer 14
-
£4,911 GBP
$6,580 USD
View
Price last confirmed 14 days ago
B+
Retailer 15
-
£5,183 GBP
ZAR 112,190 ZAR
View
B
Retailer 16
-
£6,652 GBP
View
Most Expensive
NZ Jewellers
1c628595-5e8c-4910-b08d-70337a70c21d · Sep 25
£7,118 GBP
$9,538 USD
View
Price last confirmed 37 days ago
16 more retailers have this diamond
Prices start from £3,712 GBPSave up to £2,940 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
1.54ct Round
£3,712 GBP