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Round|Natural|GIA

0.55ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 2557450247

Certificate GIA 2557450247

Diamond specifications and retailer prices

From £393 GBP
$526 USD
As of October 31, 2026
Save £1,364 GBP (78%) vs most expensive(unlock to see where)
27 retailers carry this diamond
Most expensive: £1,757 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.55ct natural round diamond

This 0.55ct natural round sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2557450247. Listed at 27 retailers as of October 30, 2026, with prices from £393 to £1,757, a £1,364 spread on the same certified stone. NZ Jewellers lists it at £1,757. 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

0.55
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2557450247
Dimensions5.19 × 5.23 × 3.29 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Cloud
Top View
5.19 mm5.23 mm0.55 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2557450247
Side View
Table 56.0%Crown 36.5°Girdle: THN-MEDPavilion 41°Culet: NoneDepth 63.1%

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 31
Current: £1,757 GBP|Low: £357 GBP|High: £1,757 GBP|Avg: £741 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 2, 2026
Retailer 11£393 GBP
Retailer 5£498 GBP
Retailer 9£511 GBP
Retailer 13£527 GBP
Retailer 4£545 GBP
Retailer 3£593 GBP
Retailer 10£642 GBP
Retailer 2£669 GBP
Retailer 6£723 GBP
Retailer 12£842 GBP
Retailer 8£865 GBP
Retailer 7£1,027 GBP
NZ Jewellers£1,757 GBP

44 data points across 13 retailers

27 retailers£393 GBP to £1,757 GBP

A
Cheapest Retailer
-
£393 GBP
$526 USD
Final sale: no returns
Retailer 2
-
£498 GBP
$667 USD
View
Price last confirmed 21 days ago
A
Retailer 3
-
£508 GBP
$680 USD
View
Retailer 4
-
£508 GBP
$680 USD
View
Price last confirmed 48 days ago
A
Retailer 5
-
£511 GBP
$685 USD
View
A
Retailer 6
-
£519 GBP
$696 USD
View
A
Retailer 7
-
£525 GBP
A$1,083 AUD
View
A
Retailer 8
-
£527 GBP
$706 USD
View
B+
Retailer 9
-
£545 GBP
$730 USD
View
B+
Retailer 10
-
£586 GBP
$785 USD
View
B+
Retailer 11
-
£589 GBP
$789 USD
View
B+
Retailer 12
-
£593 GBP
$794 USD
View
B+
Retailer 13
-
£623 GBP
$835 USD
View
B+
Retailer 14
-
£642 GBP
$860 USD
View
B+
Retailer 15
-
£642 GBP
$860 USD
View
B+
Retailer 16
-
£642 GBP
$860 USD
View
B+
Retailer 17
-
£664 GBP
$890 USD
View
B+
Retailer 18
-
£669 GBP
View
B+
Retailer 19
-
£673 GBP
$902 USD
View
B+
Retailer 20
-
£713 GBP
$955 USD
View
B+
Retailer 21
-
£723 GBP
€923 EUR
View
B+
Retailer 22
-
£784 GBP
$1,050 USD
View
Retailer 23
-
£842 GBP
A$1,737 AUD
View
Price last confirmed 29 days ago
B
Retailer 24
-
£865 GBP
ZAR 18,719 ZAR
View
B
Retailer 25
-
£1,027 GBP
View
B
Retailer 26
-
£1,616 GBP
CA$3,007 CAD
View
Most Expensive
B
NZ Jewellers
9b665b45-e3d4-40e8-97cd-0319aba1d27e · Oct 30
£1,757 GBP
$2,354 USD
View
26 more retailers have this diamond
Prices start from £393 GBPSave up to £1,364 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
0.55ct Round
£393 GBP