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Round|Natural|GIA

1.51ct F SI2 Round Natural Diamond

EX • F/SI2 • GIA 1538258148

Certificate GIA 1538258148

Diamond specifications and retailer prices

From £3,377 GBP
HK$35,400 HKD
As of November 1, 2026
Save £3,759 GBP (53%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £7,370 GBP at NZ Jewellers · As of October 17, 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 F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1538258148. Listed at 21 retailers as of October 28, 2026, with a 111% 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

1.51
Carat
F
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 1538258148
Dimensions7.35 × 7.29 × 4.59 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Cloud, Crystal, Feather, Needle
Top View
7.35 mm7.29 mm1.51 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1538258148
Side View
Table 58.0%Crown 35°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 62.7%

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 1
Current: £3,588 GBP|Low: £3,348 GBP|High: £7,164 GBP|Avg: £4,735 GBP|-0.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 2, 2026
Retailer 10£3,377 GBP
Retailer 1£3,588 GBP
Retailer 13£3,847 GBP
Retailer 2£3,871 GBP
Retailer 11£3,953 GBP
Retailer 5£4,067 GBP
Retailer 7£4,270 GBP
Retailer 3£4,344 GBP
Retailer 4£4,522 GBP
Retailer 6£4,678 GBP
Retailer 8£4,793 GBP
Retailer 9£6,491 GBP
Retailer 12£7,136 GBP

30 data points across 13 retailers

21 retailers£3,377 GBP to £7,136 GBP

A
Cheapest Retailer
-
£3,377 GBP
HK$35,400 HKD
A
Retailer 2
-
£3,588 GBP
₹458,610 INR
View
A
Retailer 3
-
£3,847 GBP
SGD 6,977 SGD
View
A
Retailer 4
-
£3,871 GBP
$5,194 USD
View
A
Retailer 5
-
£3,953 GBP
$5,305 USD
View
Retailer 6
-
£3,992 GBP
$5,357 USD
View
Price last confirmed 17 days ago
Retailer 7
-
£3,992 GBP
$5,357 USD
View
Price last confirmed 34 days ago
Retailer 8
-
£3,992 GBP
$5,357 USD
View
Price last confirmed 34 days ago
A
Retailer 9
-
£4,067 GBP
$5,458 USD
View
Final sale: no returns
A
Retailer 10
-
£4,105 GBP
$5,509 USD
View
A
Retailer 11
-
£4,270 GBP
View
A
Retailer 12
-
£4,344 GBP
$5,830 USD
View
A
Retailer 13
-
£4,522 GBP
$6,069 USD
View
Retailer 14
-
£4,606 GBP
$6,181 USD
View
Price last confirmed 34 days ago
A
Retailer 15
-
£4,678 GBP
View
A
Retailer 16
-
£4,793 GBP
€6,126 EUR
View
Retailer 17
-
£4,859 GBP
$6,521 USD
View
Price last confirmed 10 days ago
B+
Retailer 18
-
£6,491 GBP
View
B+
Retailer 19
-
£7,136 GBP
View
Retailer 20
-
£7,370 GBP
$9,890 USD
View
Price last confirmed 35 days ago
Most Expensive
NZ Jewellers
f4f1a7a0-c163-4cbe-a534-8e0fa0e569e3 · Oct 17
£7,370 GBP
$9,890 USD
View
Price last confirmed 16 days ago
20 more retailers have this diamond
Prices start from £3,377 GBPSave up to £3,759 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
£3,377 GBP