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Round|Natural|GIA

1.15ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 2554183445

Certificate GIA 2554183445

Diamond specifications and retailer prices

From £1,382 GBP
As of November 1, 2026
Save £1,206 GBP (47%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £3,658 GBP at NZ Jewellers · As of September 28, 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 2554183445. Listed at 8 retailers as of November 1, 2026, with a 87% 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
PolishVery Good
SymmetryExcellent
FluorescenceMedium
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2554183445
Dimensions6.63 × 6.67 × 4.16 mm
L/W Ratio1.01
Girdle conditionSlightly Thick
Key to symbols
Twinning Wisp, Crystal, Feather, Cavity, Needle
Top View
6.63 mm6.67 mm1.15 ctH / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2554183445
Side View
Table 58.0%Crown 36°GirdlePavilion 40.8°CuletDepth 62.6%

Caratlytics Score

How it works →
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 1
Current: £1,382 GBP|Low: £1,365 GBP|High: £2,659 GBP|Avg: £1,781 GBP|-2.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
November 1, 2026
Retailer 1£1,382 GBP
Retailer 3£1,408 GBP
Retailer 4£1,597 GBP
Retailer 2£2,588 GBP

39 data points across 4 retailers

8 retailers£1,382 GBP to £2,588 GBP

A
Cheapest Retailer
-
£1,382 GBP
A
Retailer 2
-
£1,408 GBP
View
Retailer 3
-
£1,493 GBP
$2,000 USD
View
Price last confirmed 25 days ago
Retailer 4
-
£1,499 GBP
$2,009 USD
View
Price last confirmed 36 days ago
Retailer 5
-
£1,561 GBP
$2,092 USD
View
Price last confirmed 33 days ago
B
Retailer 6
-
£2,588 GBP
View
Retailer 7
-
£3,640 GBP
$4,877 USD
View
Price last confirmed 29 days ago
Most Expensive
NZ Jewellers
0d698dd1-0694-4dfb-b3ae-02de4cea1634 · Sep 28
£3,658 GBP
$4,901 USD
View
Price last confirmed 34 days ago
7 more retailers have this diamond
Prices start from £1,382 GBPSave up to £1,206 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
£1,382 GBP