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Round|Natural|IGI

1.15ct H SI2 Round Natural Diamond

EX • H/SI2 • IGI 817606753

Shape and cutting style on the report: Round brilliant

Certificate IGI 817606753

Diamond specifications and retailer prices

From £1,264 GBP
As of October 30, 2026
Save £1,109 GBP (47%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £3,286 GBP at NZ Jewellers · As of October 11, 2026
View at NZ Jewellers

About this 1.15ct natural round diamond

This 1.15ct natural round sits in the classic one-carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 817606753. Listed at 7 retailers as of October 29, 2026, with a 88% 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

1.15
Carat
H
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35°
Pavilion angle41.5°
OriginNatural
Grading LabIGI
CertificateIGI 817606753
Dimensions6.69 × 6.72 × 4.20 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
Faint Yellowish Green
Top View
6.69 mm6.72 mm1.15 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 817606753
Side View
Table 57.0%Crown 35°Girdle: MediumPavilion 41.5°CuletDepth 62.7%

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: £1,813 GBP|Low: £1,260 GBP|High: £2,389 GBP|Avg: £1,759 GBP|+2.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
October 31, 2026
Retailer 2£1,264 GBP
Retailer 4£1,489 GBP
Retailer 1£1,813 GBP
Retailer 3£2,373 GBP

29 data points across 4 retailers

7 retailers£1,264 GBP to £2,373 GBP

A
Cheapest Retailer
-
£1,264 GBP
Retailer 2
-
£1,347 GBP
$1,805 USD
View
Price last confirmed 23 days ago
Retailer 3
-
£1,410 GBP
$1,889 USD
View
Price last confirmed 33 days ago
A
Retailer 4
-
£1,489 GBP
$1,995 USD
View
A
Retailer 5
-
£1,813 GBP
€2,313 EUR
View
B+
Retailer 6
-
£2,373 GBP
View
Most Expensive
NZ Jewellers
6a9c731f-3c81-40ec-aacc-ec1a56571c28 · Oct 11
£3,286 GBP
$4,403 USD
View
Price last confirmed 21 days ago
6 more retailers have this diamond
Prices start from £1,264 GBPSave up to £1,109 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
1.15ct Round
£1,264 GBP