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Round|Natural|GIA

1.15ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 2557163437

Certificate GIA 2557163437

Diamond specifications and retailer prices

From £1,750 GBP
As of November 1, 2026
Save £2,161 GBP (55%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £3,911 GBP at NZ Jewellers · As of October 30, 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 GIA 2557163437. Listed at 7 retailers as of October 30, 2026, with prices from £1,750 to £3,911, a £2,161 spread on the same certified stone. NZ Jewellers lists it at £3,911. 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
FluorescenceNone
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2557163437
Dimensions6.65 × 6.69 × 4.19 mm
L/W Ratio1.01
Girdle conditionSlightly Thick
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
6.65 mm6.69 mm1.15 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557163437
Side View
Table 58.0%Crown 35.5°Girdle: MED-STKPavilion 41.2°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: Nov 1
Current: £3,911 GBP|Low: £1,749 GBP|High: £3,952 GBP|Avg: £2,384 GBP|-1.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 2£1,750 GBP
Retailer 6£1,805 GBP
Retailer 4£1,870 GBP
Retailer 7£1,957 GBP
Retailer 5£1,979 GBP
Retailer 8£2,087 GBP
Retailer 3£3,277 GBP
NZ Jewellers£3,911 GBP

35 data points across 8 retailers

7 retailers£1,750 GBP to £3,911 GBP

A
Cheapest Retailer
-
£1,750 GBP
A
Retailer 2
-
£1,805 GBP
$2,418 USD
View
A
Retailer 3
-
£1,870 GBP
$2,506 USD
View
A
Retailer 4
-
£1,957 GBP
$2,622 USD
View
A
Retailer 5
-
£1,979 GBP
$2,651 USD
View
B
Retailer 6
-
£3,277 GBP
View
Most Expensive
B
NZ Jewellers
fbf756cc-4708-4c55-8faf-e896af92a08c · Oct 30
£3,911 GBP
$5,240 USD
View
6 more retailers have this diamond
Prices start from £1,750 GBPSave up to £2,161 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
£1,750 GBP