Round|Natural|GIA

0.51ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 7546006172

Certificate GIA 7546006172

Diamond specifications and retailer prices

From £274 GBP
₹34,689 INR
As of October 23, 2026
Save £227 GBP (45%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £854 GBP at MOH London · As of October 21, 2026
View at MOH London

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 7546006172. Listed at 17 retailers as of October 23, 2026, with a 83% 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

0.51
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 7546006172
Dimensions5.10 × 5.06 × 3.20 mm
L/W Ratio1.01
Key to symbols
Crystal, Cloud
Top View
5.10 mm5.06 mm0.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7546006172
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.9%

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 23
Current: £854 GBP|Low: £274 GBP|High: £882 GBP|Avg: £456 GBP|-3.1%
MOH London
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
Retailer 15
October 24, 2026
Retailer 14£274 GBP
Retailer 4£318 GBP
Retailer 8£333 GBP
Retailer 5£360 GBP
Retailer 11£389 GBP
Retailer 9£393 GBP
Retailer 13£425 GBP
Retailer 2£444 GBP
Retailer 6£471 GBP
Retailer 12£477 GBP
Retailer 10£501 GBP
Retailer 3£519 GBP
Retailer 15£562 GBP
Retailer 7£714 GBP
MOH London£854 GBP

22 data points across 15 retailers

17 retailers£274 GBP to £501 GBP

A
Cheapest Retailer
-
£274 GBP
₹34,689 INR
A
Retailer 2
-
£318 GBP
HK$3,300 HKD
View
A
Retailer 3
-
£360 GBP
$478 USD
View
A
Retailer 4
-
£389 GBP
SGD 698 SGD
View
A
Retailer 5
-
£393 GBP
$522 USD
View
A
Retailer 6
-
£425 GBP
View
A
Retailer 7
-
£437 GBP
$581 USD
View
Price last confirmed 30 days ago
A
Retailer 8
-
£444 GBP
View
B
Retailer 9
-
£447 GBP
SGD 803 SGD
View
A
Retailer 10
-
£471 GBP
$625 USD
View
Price last confirmed 10 days ago
A
Retailer 11
-
£477 GBP
View
A
Retailer 12
-
£501 GBP
€634 EUR
View
A
Retailer 13
-
£519 GBP
$690 USD
View
Price last confirmed 6 days ago
B+
Retailer 14
-
£562 GBP
ZAR 12,057 ZAR
View
Price last confirmed 8 days ago
B+
Retailer 15
-
£598 GBP
A$1,223 AUD
View
Price last confirmed 27 days ago
B
Retailer 16
-
£714 GBP
$949 USD
View
Price last confirmed 15 days ago
Most Expensive
B
MOH London
CAD833059 · Oct 21
£854 GBP
View
Price last confirmed 8 days ago
16 more retailers have this diamond
Prices start from £274 GBPSave up to £227 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
£274 GBP