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Round|Natural|GIA

0.55ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 6421533302

Certificate GIA 6421533302

Diamond specifications and retailer prices

From £397 GBP
As of November 6, 2026
Save £955 GBP (71%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £1,693 GBP at NZ Jewellers · As of September 15, 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6421533302. Listed at 17 retailers as of November 6, 2026, with a 240% 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

0.55
Carat
H
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 6421533302
Dimensions5.22 × 5.18 × 3.26 mm
L/W Ratio1.01
Top View
5.22 mm5.18 mm0.55 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6421533302
Side View
Table 59.0%Crown 34.5°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 62.7%

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 6
Current: £397 GBP|Low: £343 GBP|High: £1,000 GBP|Avg: £626 GBP|-2.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 1£397 GBP
Retailer 7£498 GBP
Retailer 5£531 GBP
Retailer 3£637 GBP
Retailer 4£655 GBP
Retailer 2£698 GBP
Retailer 6£988 GBP

43 data points across 7 retailers

17 retailers£397 GBP to £1,353 GBP

A
Cheapest Retailer
-
£397 GBP
A
Retailer 2
-
£481 GBP
View
A
Retailer 3
-
£498 GBP
View
Final sale: no returns
A
Retailer 4
-
£508 GBP
View
B+
Retailer 5
-
£531 GBP
View
Retailer 6
-
£540 GBP
View
Price last confirmed 53 days ago
Retailer 7
-
£540 GBP
View
Price last confirmed 21 days ago
Retailer 8
-
£560 GBP
View
Price last confirmed 22 days ago
B+
Retailer 9
-
£609 GBP
View
Retailer 10
-
£623 GBP
View
Price last confirmed 53 days ago
B+
Retailer 11
-
£637 GBP
View
B+
Retailer 12
-
£637 GBP
View
B+
Retailer 13
-
£655 GBP
View
B+
Retailer 14
-
£698 GBP
View
B
Retailer 15
-
£988 GBP
View
B
Retailer 16
-
£1,353 GBP
View
Most Expensive
NZ Jewellers
44670bad-dd18-4c05-89e9-2ef39dd2ad25 · Sep 15
£1,693 GBP
$2,278 USD
View
Price last confirmed 52 days ago
16 more retailers have this diamond
Prices start from £397 GBPSave up to £955 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
£397 GBP