Round|Natural|GIA

0.55ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2308949230

Certificate GIA 2308949230

Diamond specifications and retailer prices

From £269 GBP
As of November 4, 2026
Save £956 GBP (78%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,225 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 2308949230. Listed at 15 retailers as of November 4, 2026, with prices from £269 to £1,225, a £956 spread on the same certified stone. NZ Jewellers lists it at £1,225. 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
SymmetryVery Good
FluorescenceMedium
Crown angle36°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2308949230
Dimensions5.24 × 5.27 × 3.28 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
5.24 mm5.27 mm0.55 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 2308949230
Side View
Table 57.0%Crown 36°Girdle: MediumPavilion 41°Culet: NoneDepth 62.5%

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 4
Current: £1,225 GBP|Low: £269 GBP|High: £1,225 GBP|Avg: £529 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
Retailer 14
November 6, 2026
Retailer 6£269 GBP
Retailer 2£285 GBP
Retailer 13£391 GBP
Retailer 12£421 GBP
Retailer 14£421 GBP
Retailer 4£451 GBP
Retailer 5£451 GBP
Retailer 7£483 GBP
Retailer 8£525 GBP
Retailer 11£542 GBP
Retailer 3£546 GBP
Retailer 9£606 GBP
Retailer 10£901 GBP
NZ Jewellers£1,225 GBP

33 data points across 14 retailers

15 retailers£269 GBP to £1,225 GBP

A
Cheapest Retailer
-
£269 GBP
Final sale: no returns
A
Retailer 2
-
£285 GBP
View
A
Retailer 3
-
£391 GBP
View
Retailer 4
-
£421 GBP
View
Price last confirmed 8 days ago
B+
Retailer 5
-
£421 GBP
View
B+
Retailer 6
-
£451 GBP
View
B+
Retailer 7
-
£451 GBP
View
B+
Retailer 8
-
£483 GBP
View
B+
Retailer 9
-
£525 GBP
View
B
Retailer 10
-
£542 GBP
View
B+
Retailer 11
-
£546 GBP
View
B+
Retailer 12
-
£606 GBP
View
Retailer 13
-
£610 GBP
View
Price last confirmed 33 days ago
B
Retailer 14
-
£901 GBP
View
Most Expensive
B
NZ Jewellers
8cfbbe36-69f1-4f47-a42c-a4d6403e2c2e · Nov 4
£1,225 GBP
$1,640 USD
View
14 more retailers have this diamond
Prices start from £269 GBPSave up to £956 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
£269 GBP