Round|Natural|GIA

0.55ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 3555670529

Certificate GIA 3555670529

Diamond specifications and retailer prices

From £380 GBP
As of November 4, 2026
Save £1,185 GBP (76%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £1,704 GBP at NZ Jewellers · As of October 17, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 3555670529. Listed at 20 retailers as of November 4, 2026, with a 312% 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 3555670529
Dimensions5.19 × 5.23 × 3.24 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Twinning Wisp, Cloud
Top View
5.19 mm5.23 mm0.55 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3555670529
Side View
Table 59.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.1%

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: Nov 4
Current: £699 GBP|Low: £380 GBP|High: £1,007 GBP|Avg: £710 GBP|-0.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 7£380 GBP
Retailer 9£609 GBP
Retailer 6£628 GBP
Retailer 3£642 GBP
Retailer 2£698 GBP
Retailer 1£699 GBP
Retailer 8£817 GBP
Retailer 4£839 GBP
Retailer 5£995 GBP

44 data points across 9 retailers

20 retailers£380 GBP to £1,565 GBP

A
Cheapest Retailer
-
£380 GBP
Final sale: no returns
Retailer 2
-
£483 GBP
View
Price last confirmed 17 days ago
Retailer 3
-
£493 GBP
View
Price last confirmed 21 days ago
Retailer 4
-
£493 GBP
View
Price last confirmed 67 days ago
A
Retailer 5
-
£504 GBP
View
A
Retailer 6
-
£511 GBP
View
Retailer 7
-
£568 GBP
View
Price last confirmed 45 days ago
B+
Retailer 8
-
£573 GBP
View
B+
Retailer 9
-
£604 GBP
View
B+
Retailer 10
-
£628 GBP
View
B+
Retailer 11
-
£642 GBP
View
B+
Retailer 12
-
£652 GBP
View
B+
Retailer 13
-
£691 GBP
View
B+
Retailer 14
-
£698 GBP
View
B+
Retailer 15
-
£699 GBP
View
Retailer 16
-
£817 GBP
View
Price last confirmed 33 days ago
B
Retailer 17
-
£839 GBP
View
B
Retailer 18
-
£995 GBP
View
B
Retailer 19
-
£1,565 GBP
View
Most Expensive
NZ Jewellers
67698757-780f-404d-855a-2be4db3f102c · Oct 17
£1,704 GBP
$2,294 USD
View
Price last confirmed 20 days ago
19 more retailers have this diamond
Prices start from £380 GBPSave up to £1,185 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
£380 GBP