Round|Natural|GIA

1.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 2536020942

Certificate GIA 2536020942

Diamond specifications and retailer prices

From £5,160 GBP
As of November 4, 2026
Save £2,046 GBP (28%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £9,336 GBP at NZ Jewellers · As of September 28, 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 2536020942. Listed at 19 retailers as of November 4, 2026, with a 40% 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
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2536020942
Dimensions7.29 × 7.25 × 4.60 mm
L/W Ratio1.01
Top View
7.29 mm7.25 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2536020942
Side View
Table 57.0%Crown 36.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 63.3%

Caratlytics Score

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

Price History

Last verified: Nov 4
Current: £7,206 GBP|Low: £4,191 GBP|High: £7,984 GBP|Avg: £5,618 GBP|+21.6%
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 5, 2026
Retailer 12£4,191 GBP
Retailer 11£4,667 GBP
Retailer 5£4,668 GBP
Retailer 8£4,785 GBP
Retailer 4£5,006 GBP
Retailer 2£5,160 GBP
Retailer 3£5,399 GBP
Retailer 13£5,437 GBP
Retailer 9£6,779 GBP
Retailer 6£6,801 GBP
Retailer 1£7,206 GBP
Retailer 10£7,873 GBP
Retailer 7£7,946 GBP

26 data points across 13 retailers

19 retailers£5,160 GBP to £7,206 GBP

Retailer 1
-
£4,191 GBP
Price last confirmed 30 days ago
Retailer 2
-
£4,668 GBP
View
Price last confirmed 25 days ago
Retailer 3
-
£4,975 GBP
View
Price last confirmed 23 days ago
Retailer 4
-
£5,006 GBP
View
Price last confirmed 23 days ago
Retailer 5
-
£5,057 GBP
View
Price last confirmed 29 days ago
Retailer 6
-
£5,057 GBP
View
Price last confirmed 39 days ago
Retailer 7
-
£5,135 GBP
View
Price last confirmed 38 days ago
B+
Retailer 8
-
£5,160 GBP
View
B+
Retailer 9
-
£5,399 GBP
View
Retailer 10
-
£5,437 GBP
View
Price last confirmed 33 days ago
B
Retailer 11
-
£5,443 GBP
View
Retailer 12
-
£5,835 GBP
View
Price last confirmed 38 days ago
Retailer 13
-
£6,151 GBP
View
Price last confirmed 24 days ago
Retailer 14
-
£6,779 GBP
View
Price last confirmed 25 days ago
B
Retailer 15
-
£6,801 GBP
View
B
Retailer 16
-
£7,206 GBP
View
Retailer 17
-
£7,873 GBP
View
Price last confirmed 26 days ago
Retailer 18
-
£7,946 GBP
View
Price last confirmed 23 days ago
Most Expensive
NZ Jewellers
1c847ad7-4fd8-4091-97c1-cfb16bbe43e1 · Sep 28
£9,336 GBP
$12,496 USD
View
Price last confirmed 39 days ago
18 more retailers have this diamond
Prices start from £5,160 GBPSave up to £2,046 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
£5,160 GBP