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Heart|Natural|GIA

1.51ct H SI1 Heart Natural Diamond

VG • H/SI1 • GIA 5231997262

Certificate GIA 5231997262

Diamond specifications and retailer prices

From £2,844 GBP
$3,810 USD
As of November 1, 2026
Save £3,113 GBP (52%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £7,217 GBP at NZ Jewellers · As of September 25, 2026
View at NZ Jewellers

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 5231997262. Listed at 18 retailers as of October 27, 2026, with a 109% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
H
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5231997262
Dimensions6.95 × 7.95 × 4.68 mm
L/W Ratio1.14
Girdle conditionFaceted
Top View
6.95 mm7.95 mm1.51 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5231997262
Side View
Table 59.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 58.8%

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: £2,847 GBP|Low: £2,809 GBP|High: £6,611 GBP|Avg: £3,816 GBP|-3.2%
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
Retailer 14
Retailer 15
Retailer 16
November 2, 2026
Retailer 13£2,844 GBP
Retailer 1£2,847 GBP
Retailer 11£3,008 GBP
Retailer 9£3,117 GBP
Retailer 6£3,188 GBP
Retailer 7£3,194 GBP
Retailer 4£3,205 GBP
Retailer 15£3,209 GBP
Retailer 3£3,385 GBP
Retailer 12£3,388 GBP
Retailer 2£3,574 GBP
Retailer 10£3,707 GBP
Retailer 8£4,215 GBP
Retailer 16£4,582 GBP
Retailer 14£5,854 GBP
Retailer 5£5,957 GBP

26 data points across 16 retailers

18 retailers£2,844 GBP to £5,957 GBP

A
Cheapest Retailer
-
£2,844 GBP
$3,810 USD
A
Retailer 2
-
£2,847 GBP
HK$29,800 HKD
View
A
Retailer 3
-
£3,008 GBP
$4,030 USD
View
A
Retailer 4
-
£3,117 GBP
$4,176 USD
View
Final sale: no returns
A
Retailer 5
-
£3,188 GBP
$4,272 USD
View
A
Retailer 6
-
£3,194 GBP
$4,280 USD
View
A
Retailer 7
-
£3,205 GBP
$4,294 USD
View
A
Retailer 8
-
£3,209 GBP
€4,094 EUR
View
B+
Retailer 9
-
£3,385 GBP
$4,535 USD
View
B+
Retailer 10
-
£3,388 GBP
$4,540 USD
View
B+
Retailer 11
-
£3,574 GBP
$4,789 USD
View
B+
Retailer 12
-
£3,707 GBP
View
Retailer 13
-
£4,215 GBP
A$8,689 AUD
View
Price last confirmed 23 days ago
B
Retailer 14
-
£4,253 GBP
A$8,768 AUD
View
B+
Retailer 15
-
£4,582 GBP
ZAR 99,190 ZAR
View
B
Retailer 16
-
£5,854 GBP
View
B
Retailer 17
-
£5,957 GBP
$7,981 USD
View
Most Expensive
NZ Jewellers
a7f576fe-f550-4bb9-97c3-38e66aeea21e · Sep 25
£7,217 GBP
$9,670 USD
View
Price last confirmed 37 days ago
17 more retailers have this diamond
Prices start from £2,844 GBPSave up to £3,113 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 Heart
£2,844 GBP