Round|Natural|IGI

1.53ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 826683678

Shape and cutting style on the report: Round brilliant

Certificate IGI 826683678

Diamond specifications and retailer prices

From £1,304 GBP
As of November 6, 2026
Save £1,585 GBP (55%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £3,457 GBP at NZ Jewellers · As of September 19, 2026
View at NZ Jewellers

About this 1.53ct natural round diamond

This 1.53ct 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 826683678. Listed at 14 retailers as of November 4, 2026, with a 122% 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

1.53
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle40.8°
OriginNatural
Grading LabIGI
CertificateIGI 826683678
Dimensions7.28 × 7.30 × 4.59 mm
L/W Ratio1.00
Girdle conditionFaceted
Top View
7.28 mm7.30 mm1.53 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 826683678
Side View
Table 57.0%Crown 36.1°Girdle: MED-STKPavilion 40.8°CuletDepth 62.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £1,304 GBP|Low: £1,304 GBP|High: £2,927 GBP|Avg: £1,888 GBP|-2.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 1£1,304 GBP
Retailer 7£1,493 GBP
Retailer 2£1,800 GBP
Retailer 3£1,817 GBP
Retailer 4£2,018 GBP
Retailer 5£2,051 GBP
Retailer 6£2,889 GBP

28 data points across 7 retailers

14 retailers£1,304 GBP to £2,889 GBP

A
Cheapest Retailer
-
£1,304 GBP
A
Retailer 2
-
£1,493 GBP
View
Retailer 3
-
£1,654 GBP
View
Price last confirmed 44 days ago
Retailer 4
-
£1,654 GBP
View
Price last confirmed 29 days ago
B+
Retailer 5
-
£1,661 GBP
View
Retailer 6
-
£1,730 GBP
View
Price last confirmed 38 days ago
B+
Retailer 7
-
£1,756 GBP
View
A
Retailer 8
-
£1,800 GBP
View
A
Retailer 9
-
£1,817 GBP
View
Retailer 10
-
£1,908 GBP
View
Price last confirmed 45 days ago
A
Retailer 11
-
£2,018 GBP
View
A
Retailer 12
-
£2,051 GBP
View
B+
Retailer 13
-
£2,889 GBP
View
Most Expensive
NZ Jewellers
67bfcd6f-b34b-412d-b10d-40a3ec8d55c0 · Sep 19
£3,457 GBP
$4,653 USD
View
Price last confirmed 47 days ago
13 more retailers have this diamond
Prices start from £1,304 GBPSave up to £1,585 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
1.53ct Round
£1,304 GBP