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Heart|Natural|GIA

1.51ct J SI1 Heart Natural Diamond

VG • J/SI1 • GIA 6461791663

Certificate GIA 6461791663

Diamond specifications and retailer prices

From £1,753 GBP
As of November 5, 2026
Save £2,448 GBP (58%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £4,201 GBP at NZ Jewellers · As of November 5, 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 J 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 6461791663. Listed at 16 retailers as of November 5, 2026, with prices from £1,753 to £4,201, a £2,448 spread on the same certified stone. NZ Jewellers lists it at £4,201. 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
J
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43°
Pavilion angle40.7°
OriginNatural
Grading LabGIA
CertificateGIA 6461791663
Dimensions7.88 × 6.69 × 3.99 mm
L/W Ratio1.18
Top View
7.88 mm6.69 mm1.51 ctJ / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6461791663
Side View
Table 61.0%Crown 43°Girdle: MED-THKPavilion 40.7°Culet: NoneDepth 59.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £4,201 GBP|Low: £1,743 GBP|High: £4,233 GBP|Avg: £2,649 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
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 6, 2026
Retailer 11£1,753 GBP
Retailer 6£2,140 GBP
Retailer 4£2,181 GBP
Retailer 2£2,307 GBP
Retailer 3£2,338 GBP
Retailer 14£2,411 GBP
Retailer 16£2,411 GBP
Retailer 9£2,495 GBP
Retailer 15£2,504 GBP
Retailer 7£2,519 GBP
Retailer 5£2,601 GBP
Retailer 8£2,681 GBP
Retailer 13£2,782 GBP
Retailer 10£2,943 GBP
Retailer 12£4,022 GBP
NZ Jewellers£4,201 GBP

34 data points across 16 retailers

16 retailers£1,753 GBP to £4,201 GBP

A
Cheapest Retailer
-
£1,753 GBP
B+
Retailer 2
-
£2,140 GBP
View
A
Retailer 3
-
£2,181 GBP
View
A
Retailer 4
-
£2,307 GBP
View
B+
Retailer 5
-
£2,338 GBP
View
Retailer 6
-
£2,411 GBP
View
Price last confirmed 9 days ago
B+
Retailer 7
-
£2,411 GBP
View
B+
Retailer 8
-
£2,495 GBP
View
B+
Retailer 9
-
£2,504 GBP
View
B+
Retailer 10
-
£2,519 GBP
View
B+
Retailer 11
-
£2,601 GBP
View
Retailer 12
-
£2,681 GBP
View
Price last confirmed 34 days ago
B+
Retailer 13
-
£2,782 GBP
View
B+
Retailer 14
-
£2,943 GBP
View
B
Retailer 15
-
£4,022 GBP
View
Most Expensive
B
NZ Jewellers
ba6110bf-a87c-4514-9f34-12ce22442cc8 · Nov 5
£4,201 GBP
$5,623 USD
View
15 more retailers have this diamond
Prices start from £1,753 GBPSave up to £2,448 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
£1,753 GBP