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1.13ct I SI1 Round Natural Diamond

EX • I/SI1 • IGI 670479172

Shape and cutting style on the report: Round brilliant

Certificate IGI 670479172

Diamond specifications and retailer prices

From £1,789 GBP
$2,397 USD
As of October 30, 2026
Save £2,387 GBP (57%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £4,176 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.13ct natural round diamond

This 1.13ct natural round sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 670479172. Listed at 14 retailers as of October 30, 2026, with prices from £1,789 to £4,176, a £2,387 spread on the same certified stone. NZ Jewellers lists it at £4,176. 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

1.13
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle40.7°
OriginNatural
Grading LabIGI
CertificateIGI 670479172
Dimensions6.62 × 6.59 × 4.15 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Top View
6.62 mm6.59 mm1.13 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 670479172
Side View
Table 56.0%Crown 35.1°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 62.8%

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: £1,876 GBP|Low: £1,536 GBP|High: £3,457 GBP|Avg: £2,265 GBP|-1.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 6£1,843 GBP
Retailer 1£1,876 GBP
Retailer 8£1,967 GBP
Retailer 7£2,074 GBP
Retailer 3£2,160 GBP
Retailer 5£2,342 GBP
Retailer 4£2,455 GBP
Retailer 2£3,416 GBP

41 data points across 8 retailers

14 retailers£1,789 GBP to £4,176 GBP

A
Cheapest Retailer
-
£1,789 GBP
$2,397 USD
A
Retailer 2
-
£1,843 GBP
$2,470 USD
View
Final sale: no returns
A
Retailer 3
-
£1,876 GBP
View
B+
Retailer 4
-
£1,967 GBP
$2,635 USD
View
B+
Retailer 5
-
£1,997 GBP
$2,676 USD
View
B+
Retailer 6
-
£1,997 GBP
$2,676 USD
View
B+
Retailer 7
-
£2,074 GBP
$2,779 USD
View
B+
Retailer 8
-
£2,103 GBP
$2,817 USD
View
B+
Retailer 9
-
£2,160 GBP
View
B+
Retailer 10
-
£2,305 GBP
$3,088 USD
View
B+
Retailer 11
-
£2,342 GBP
€2,989 EUR
View
B+
Retailer 12
-
£2,455 GBP
ZAR 53,139 ZAR
View
B
Retailer 13
-
£3,416 GBP
View
Most Expensive
B
NZ Jewellers
a83b745a-ace1-4dc3-96ed-a9fd331a57d1 · Oct 30
£4,176 GBP
$5,595 USD
View
13 more retailers have this diamond
Prices start from £1,789 GBPSave up to £2,387 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
1.13ct Round
£1,789 GBP