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Round|Natural|GIA

0.55ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2556999425

Certificate GIA 2556999425

Diamond specifications and retailer prices

From £317 GBP
As of November 6, 2026
Save £1,044 GBP (77%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,360 GBP at NZ Jewellers · As of November 4, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2556999425. Listed at 16 retailers as of November 4, 2026, with prices from £317 to £1,360, a £1,044 spread on the same certified stone. NZ Jewellers lists it at £1,360. 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
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2556999425
Dimensions5.22 × 5.26 × 3.24 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Top View
5.22 mm5.26 mm0.55 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556999425
Side View
Table 59.0%Crown 35.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.7%

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 6
Current: £317 GBP|Low: £272 GBP|High: £1,014 GBP|Avg: £537 GBP|-1.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 1£317 GBP
Retailer 5£400 GBP
Retailer 6£467 GBP
Retailer 7£501 GBP
Retailer 2£529 GBP
Retailer 3£576 GBP
Retailer 4£1,002 GBP

42 data points across 7 retailers

16 retailers£317 GBP to £1,360 GBP

A
Cheapest Retailer
-
£317 GBP
A
Retailer 2
-
£400 GBP
View
Final sale: no returns
Retailer 3
-
£434 GBP
View
Price last confirmed 44 days ago
Retailer 4
-
£434 GBP
View
Price last confirmed 60 days ago
B+
Retailer 5
-
£434 GBP
View
Retailer 6
-
£449 GBP
View
Price last confirmed 10 days ago
B+
Retailer 7
-
£467 GBP
View
Retailer 8
-
£501 GBP
View
Price last confirmed 60 days ago
Retailer 9
-
£501 GBP
View
Price last confirmed 45 days ago
B+
Retailer 10
-
£501 GBP
View
B+
Retailer 11
-
£529 GBP
View
B+
Retailer 12
-
£576 GBP
View
B
Retailer 13
-
£1,002 GBP
View
Retailer 14
-
£1,360 GBP
View
Price last confirmed 46 days ago
Retailer 15
-
£1,360 GBP
View
Price last confirmed 69 days ago
Most Expensive
B
NZ Jewellers
bbb91b0d-06a8-4b1f-942b-677ca9ea70bc · Nov 4
£1,360 GBP
$1,821 USD
View
15 more retailers have this diamond
Prices start from £317 GBPSave up to £1,044 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
£317 GBP