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Round|Natural|GIA

1.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 7481667514

Certificate GIA 7481667514

Diamond specifications and retailer prices

From £5,056 GBP
$6,775 USD
As of November 1, 2026
Save £5,899 GBP (54%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £10,955 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7481667514. Listed at 19 retailers as of October 30, 2026, with prices from £5,056 to £10,955, a £5,899 spread on the same certified stone. NZ Jewellers lists it at £10,955. 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
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle35°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 7481667514
Dimensions7.35 × 7.30 × 4.53 mm
L/W Ratio1.01
Star length55%
Lower girdle80%
Girdle conditionFaceted
Culet sizeNone
Cert comments
Pinpoints are not shown.
Top View
7.35 mm7.30 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 7481667514
Side View
Table 58.0%Crown 35°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £6,761 GBP|Low: £5,056 GBP|High: £9,239 GBP|Avg: £6,640 GBP|+3.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 8£5,056 GBP
Retailer 7£5,129 GBP
Retailer 9£5,471 GBP
Retailer 2£6,025 GBP
Retailer 3£6,063 GBP
Retailer 6£6,203 GBP
Retailer 1£6,761 GBP
Retailer 10£7,347 GBP
Retailer 4£8,047 GBP
Retailer 5£9,177 GBP

44 data points across 10 retailers

19 retailers£5,056 GBP to £10,955 GBP

B+
Cheapest Retailer
-
£5,056 GBP
$6,775 USD
B+
Retailer 2
-
£5,129 GBP
$6,872 USD
View
B+
Retailer 3
-
£5,471 GBP
$7,330 USD
View
B+
Retailer 4
-
£5,477 GBP
$7,339 USD
View
B+
Retailer 5
-
£5,934 GBP
$7,951 USD
View
B+
Retailer 6
-
£6,025 GBP
$8,073 USD
View
B+
Retailer 7
-
£6,063 GBP
View
Retailer 8
-
£6,203 GBP
A$12,788 AUD
View
Price last confirmed 11 days ago
B
Retailer 9
-
£6,530 GBP
$8,750 USD
View
B
Retailer 10
-
£6,530 GBP
$8,750 USD
View
B
Retailer 11
-
£6,747 GBP
$9,040 USD
View
B
Retailer 12
-
£6,761 GBP
€8,628 EUR
View
B
Retailer 13
-
£6,847 GBP
$9,174 USD
View
Retailer 14
-
£7,214 GBP
$9,666 USD
View
Price last confirmed 9 days ago
Retailer 15
-
£7,347 GBP
View
Price last confirmed 33 days ago
B
Retailer 16
-
£8,047 GBP
ZAR 174,184 ZAR
View
B
Retailer 17
-
£9,177 GBP
View
B
Retailer 18
-
£10,351 GBP
View
Most Expensive
B
NZ Jewellers
9149c5bf-0b50-4c78-bce4-33fd8893ebd1 · Oct 30
£10,955 GBP
$14,679 USD
View
18 more retailers have this diamond
Prices start from £5,056 GBPSave up to £5,899 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.

B+
1.51ct Round
£5,056 GBP