Round|Natural|GIA

0.55ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 2454893009

Certificate GIA 2454893009

Diamond specifications and retailer prices

From £429 GBP
₹54,775 INR
As of November 2, 2026
Save £1,135 GBP (73%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £1,809 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2454893009. Listed at 23 retailers as of November 2, 2026, with a 264% 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2454893009
Dimensions5.21 × 5.17 × 3.26 mm
L/W Ratio1.01
Star length50%
Top View
5.21 mm5.17 mm0.55 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2454893009
Side View
Table 58.0%Crown 35.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.8%

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 2
Current: £429 GBP|Low: £428 GBP|High: £1,069 GBP|Avg: £710 GBP|-1.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 1£429 GBP
Retailer 11£532 GBP
Retailer 8£577 GBP
Retailer 2£578 GBP
Retailer 9£682 GBP
Retailer 4£690 GBP
Retailer 10£705 GBP
Retailer 5£746 GBP
Retailer 3£868 GBP
Retailer 7£888 GBP
Retailer 6£1,057 GBP

36 data points across 11 retailers

23 retailers£429 GBP to £1,564 GBP

A
Cheapest Retailer
-
£429 GBP
₹54,775 INR
Retailer 2
-
£515 GBP
$690 USD
View
Price last confirmed 21 days ago
B+
Retailer 3
-
£532 GBP
$713 USD
View
Final sale: no returns
B+
Retailer 4
-
£539 GBP
A$1,111 AUD
View
Retailer 5
-
£577 GBP
$773 USD
View
Price last confirmed 48 days ago
B+
Retailer 6
-
£577 GBP
$773 USD
View
Retailer 7
-
£577 GBP
$773 USD
View
Price last confirmed 17 days ago
B+
Retailer 8
-
£578 GBP
$775 USD
View
B+
Retailer 9
-
£586 GBP
$785 USD
View
Retailer 10
-
£599 GBP
$803 USD
View
Price last confirmed 18 days ago
B+
Retailer 11
-
£599 GBP
$803 USD
View
B+
Retailer 12
-
£641 GBP
$859 USD
View
Retailer 13
-
£666 GBP
$892 USD
View
Price last confirmed 49 days ago
B+
Retailer 14
-
£676 GBP
$906 USD
View
B+
Retailer 15
-
£682 GBP
View
B+
Retailer 16
-
£690 GBP
View
B
Retailer 17
-
£705 GBP
$945 USD
View
B+
Retailer 18
-
£746 GBP
€952 EUR
View
Retailer 19
-
£868 GBP
A$1,788 AUD
View
Price last confirmed 29 days ago
Retailer 20
-
£888 GBP
ZAR 19,231 ZAR
View
Price last confirmed 7 days ago
B
Retailer 21
-
£1,057 GBP
View
B
Retailer 22
-
£1,564 GBP
View
Most Expensive
NZ Jewellers
9f00f750-bed9-4676-a1ce-8fb98a8617b8 · Sep 15
£1,809 GBP
$2,424 USD
View
Price last confirmed 48 days ago
22 more retailers have this diamond
Prices start from £429 GBPSave up to £1,135 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
£429 GBP