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Round|Natural|IGI

1.54ct I SI1 Round Natural Diamond

EX • I/SI1 • IGI 642405010

Shape and cutting style on the report: Round brilliant

Certificate IGI 642405010

Diamond specifications and retailer prices

From £3,632 GBP
$4,866 USD
As of October 30, 2026
Save £3,333 GBP (48%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £6,965 GBP at NZ Jewellers · As of October 30, 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 642405010. Listed at 15 retailers as of October 30, 2026, with prices from £3,632 to £6,965, a £3,333 spread on the same certified stone. NZ Jewellers lists it at £6,965. 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 angle34.6°
Pavilion angle41.6°
OriginNatural
Grading LabIGI
CertificateIGI 642405010
Dimensions7.36 × 7.29 × 4.64 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.36 mm7.29 mm1.54 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 642405010
Side View
Table 57.0%Crown 34.6°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 63.3%

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: £4,180 GBP|Low: £3,203 GBP|High: £6,551 GBP|Avg: £4,471 GBP|-1.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 7£3,632 GBP
Retailer 6£3,661 GBP
Retailer 8£3,844 GBP
Retailer 3£4,116 GBP
Retailer 9£4,165 GBP
Retailer 1£4,180 GBP
Retailer 5£4,452 GBP
Retailer 4£5,119 GBP
Retailer 2£6,473 GBP

41 data points across 9 retailers

15 retailers£3,632 GBP to £6,965 GBP

A
Cheapest Retailer
-
£3,632 GBP
$4,866 USD
A
Retailer 2
-
£3,661 GBP
$4,905 USD
View
B+
Retailer 3
-
£3,844 GBP
$5,150 USD
View
Final sale: no returns
A
Retailer 4
-
£3,896 GBP
$5,220 USD
View
A
Retailer 5
-
£4,116 GBP
View
B+
Retailer 6
-
£4,165 GBP
$5,580 USD
View
B+
Retailer 7
-
£4,165 GBP
$5,580 USD
View
B+
Retailer 8
-
£4,165 GBP
$5,580 USD
View
A
Retailer 9
-
£4,180 GBP
View
B+
Retailer 10
-
£4,279 GBP
$5,734 USD
View
B+
Retailer 11
-
£4,452 GBP
€5,681 EUR
View
B+
Retailer 12
-
£4,805 GBP
$6,438 USD
View
B+
Retailer 13
-
£5,119 GBP
ZAR 110,799 ZAR
View
B
Retailer 14
-
£6,473 GBP
View
Most Expensive
B
NZ Jewellers
4fa767b2-f529-4498-92f7-20d2810a8a0d · Oct 30
£6,965 GBP
$9,332 USD
View
14 more retailers have this diamond
Prices start from £3,632 GBPSave up to £3,333 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
£3,632 GBP