CaratHunter
Plans
Round|Natural|GIA

0.51ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 7553393622

Certificate GIA 7553393622

Diamond specifications and retailer prices

From £474 GBP
$635 USD
As of October 27, 2026
Save £1,119 GBP (70%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £1,593 GBP at NZ Jewellers · As of October 27, 2026
View at NZ Jewellers

About this 0.51ct natural round diamond

This 0.51ct 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 7553393622. Listed at 24 retailers as of October 27, 2026, with prices from £474 to £1,593, a £1,119 spread on the same certified stone. NZ Jewellers lists it at £1,593. 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

0.51
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 7553393622
Dimensions5.08 × 5.10 × 3.21 mm
L/W Ratio1.00
Culet sizeNone
Key to symbols
Cloud
Top View
5.08 mm5.10 mm0.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 7553393622
Side View
Table 55.0%Crown 35°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 63.1%

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: Oct 27
Current: £679 GBP|Low: £354 GBP|High: £1,187 GBP|Avg: £666 GBP|+1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 28, 2026
Retailer 8£354 GBP
Retailer 10£496 GBP
Retailer 2£539 GBP
Retailer 4£601 GBP
Retailer 5£620 GBP
Retailer 3£661 GBP
Retailer 1£679 GBP
Retailer 9£764 GBP
Retailer 6£782 GBP
Retailer 7£1,179 GBP

35 data points across 10 retailers

24 retailers£474 GBP to £1,593 GBP

A
Cheapest Retailer
-
£474 GBP
$635 USD
A
Retailer 2
-
£479 GBP
$642 USD
View
Retailer 3
-
£496 GBP
$664 USD
View
Price last confirmed 7 days ago
Retailer 4
-
£496 GBP
$664 USD
View
Price last confirmed 7 days ago
B+
Retailer 5
-
£505 GBP
$677 USD
View
B+
Retailer 6
-
£531 GBP
$711 USD
View
B+
Retailer 7
-
£539 GBP
$722 USD
View
Retailer 8
-
£543 GBP
$727 USD
View
Price last confirmed 7 days ago
B+
Retailer 9
-
£563 GBP
$754 USD
View
B+
Retailer 10
-
£582 GBP
$780 USD
View
B+
Retailer 11
-
£582 GBP
$780 USD
View
B+
Retailer 12
-
£601 GBP
$805 USD
View
B+
Retailer 13
-
£605 GBP
$810 USD
View
B+
Retailer 14
-
£608 GBP
$815 USD
View
B+
Retailer 15
-
£620 GBP
View
B+
Retailer 16
-
£643 GBP
$862 USD
View
B+
Retailer 17
-
£661 GBP
View
B+
Retailer 18
-
£679 GBP
€866 EUR
View
B+
Retailer 19
-
£708 GBP
$948 USD
View
Retailer 20
-
£764 GBP
A$1,574 AUD
View
Price last confirmed 28 days ago
B+
Retailer 21
-
£782 GBP
ZAR 16,926 ZAR
View
B
Retailer 22
-
£1,179 GBP
View
B
Retailer 23
-
£1,459 GBP
CA$2,715 CAD
View
Most Expensive
B
NZ Jewellers
345bfcde-ed97-42b4-ac88-7a1a1bb92407 · Oct 27
£1,593 GBP
$2,134 USD
View
23 more retailers have this diamond
Prices start from £474 GBPSave up to £1,119 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
0.51ct Round
£474 GBP