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1.51ct G SI2 Round Natural Diamond

EX • G/SI2 • GIA 6511363422

Certificate GIA 6511363422

Diamond specifications and retailer prices

From £4,266 GBP
$5,716 USD
As of October 30, 2026
Save £5,025 GBP (54%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £9,291 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6511363422. Listed at 16 retailers as of October 30, 2026, with prices from £4,266 to £9,291, a £5,025 spread on the same certified stone. NZ Jewellers lists it at £9,291. 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

1.51
Carat
G
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6511363422
Dimensions7.31 × 7.27 × 4.54 mm
L/W Ratio1.01
Top View
7.31 mm7.27 mm1.51 ctG / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6511363422
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.5%

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 30
Current: £9,291 GBP|Low: £4,028 GBP|High: £9,291 GBP|Avg: £5,767 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 7£4,209 GBP
Retailer 8£4,389 GBP
Retailer 9£4,644 GBP
Retailer 3£4,645 GBP
Retailer 11£5,033 GBP
Retailer 10£5,110 GBP
Retailer 5£5,202 GBP
Retailer 2£5,756 GBP
Retailer 12£5,806 GBP
Retailer 4£6,121 GBP
Retailer 6£7,783 GBP
NZ Jewellers£9,291 GBP

36 data points across 12 retailers

16 retailers£4,266 GBP to £9,291 GBP

Retailer 1
-
£4,209 GBP
$5,640 USD
Price last confirmed 10 days ago
A
Retailer 2
-
£4,266 GBP
$5,716 USD
View
A
Retailer 3
-
£4,389 GBP
$5,881 USD
View
B+
Retailer 4
-
£4,644 GBP
$6,223 USD
View
Final sale: no returns
A
Retailer 5
-
£4,645 GBP
$6,224 USD
View
B+
Retailer 6
-
£5,033 GBP
$6,743 USD
View
B+
Retailer 7
-
£5,110 GBP
$6,847 USD
View
B+
Retailer 8
-
£5,202 GBP
View
B+
Retailer 9
-
£5,493 GBP
$7,360 USD
View
B+
Retailer 10
-
£5,493 GBP
$7,360 USD
View
B+
Retailer 11
-
£5,509 GBP
$7,381 USD
View
B+
Retailer 12
-
£5,680 GBP
$7,610 USD
View
B+
Retailer 13
-
£5,756 GBP
€7,345 EUR
View
B+
Retailer 14
-
£5,806 GBP
$7,780 USD
View
B
Retailer 15
-
£7,783 GBP
View
Most Expensive
B
NZ Jewellers
674544cd-a763-4487-a622-a750ca9529cc · Oct 30
£9,291 GBP
$12,449 USD
View
15 more retailers have this diamond
Prices start from £4,266 GBPSave up to £5,025 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
1.51ct Round
£4,266 GBP