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Round|Natural|IGI

1.54ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 635477901

Shape and cutting style on the report: Round brilliant

Certificate IGI 635477901

Diamond specifications and retailer prices

From £1,171 GBP
As of November 6, 2026
Save £629 GBP (35%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £3,599 GBP at NZ Jewellers · As of September 28, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 635477901. Listed at 13 retailers as of November 5, 2026, with a 54% 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle41.4°
OriginNatural
Grading LabIGI
CertificateIGI 635477901
Dimensions7.36 × 7.29 × 4.63 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.36 mm7.29 mm1.54 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 635477901
Side View
Table 58.0%Crown 35.7°Girdle: Slightly ThickPavilion 41.4°Culet: NoneDepth 63.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £1,171 GBP|Low: £1,171 GBP|High: £2,616 GBP|Avg: £1,699 GBP|-2.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 1£1,171 GBP
Retailer 6£1,434 GBP
Retailer 2£1,606 GBP
Retailer 3£1,611 GBP
Retailer 4£1,801 GBP
Retailer 5£2,598 GBP

32 data points across 6 retailers

13 retailers£1,171 GBP to £1,801 GBP

A
Cheapest Retailer
-
£1,171 GBP
A
Retailer 2
-
£1,333 GBP
View
A
Retailer 3
-
£1,434 GBP
View
Retailer 4
-
£1,476 GBP
View
Price last confirmed 36 days ago
A
Retailer 5
-
£1,505 GBP
View
Retailer 6
-
£1,544 GBP
View
Price last confirmed 38 days ago
A
Retailer 7
-
£1,578 GBP
View
A
Retailer 8
-
£1,606 GBP
View
A
Retailer 9
-
£1,611 GBP
View
Retailer 10
-
£1,703 GBP
View
Price last confirmed 38 days ago
A
Retailer 11
-
£1,801 GBP
View
Retailer 12
-
£2,598 GBP
View
Price last confirmed 8 days ago
Most Expensive
NZ Jewellers
19c76719-e8be-4156-8aaf-56823ce27e86 · Sep 28
£3,599 GBP
$4,817 USD
View
Price last confirmed 39 days ago
12 more retailers have this diamond
Prices start from £1,171 GBPSave up to £629 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
£1,171 GBP