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Heart|Natural|GIA

1.51ct F SI1 Heart Natural Diamond

FR • F/SI1 • GIA 1545335980

Certificate GIA 1545335980

Diamond specifications and retailer prices

From £2,693 GBP
SGD 4,883 SGD
As of October 31, 2026
Save £3,645 GBP (58%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £6,655 GBP at NZ Jewellers · As of October 18, 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 F colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1545335980. Listed at 7 retailers as of October 31, 2026, with a 135% 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
F
Colour
SI1
Clarity
Fair
Cut (retailer stated)

Specifications

Cut (retailer stated)Fair
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1545335980
Dimensions7.51 × 6.69 × 4.86 mm
L/W Ratio1.12
Key to symbols
Feather, Indented Natural
Top View
7.51 mm6.69 mm1.51 ctF / SI1
OriginNatural
CutFair
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1545335980
Side View
Table 59.0%CrownGirdle: Very ThickPavilionCulet: NDepth 64.7%

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: Oct 31
Current: £6,338 GBP|Low: £2,384 GBP|High: £6,781 GBP|Avg: £4,105 GBP|-5.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 3£2,693 GBP
Retailer 10£3,299 GBP
Retailer 2£3,402 GBP
Retailer 8£3,530 GBP
Retailer 4£3,673 GBP
Retailer 9£3,733 GBP
Retailer 7£3,943 GBP
Retailer 5£3,971 GBP
Retailer 6£5,437 GBP
Retailer 1£6,338 GBP

25 data points across 10 retailers

7 retailers£2,693 GBP to £6,338 GBP

A
Cheapest Retailer
-
£2,693 GBP
SGD 4,883 SGD
B+
Retailer 2
-
£3,673 GBP
$4,929 USD
View
B+
Retailer 3
-
£3,971 GBP
$5,329 USD
View
Retailer 4
-
£3,979 GBP
$5,340 USD
View
Price last confirmed 17 days ago
Retailer 5
-
£3,979 GBP
$5,340 USD
View
Price last confirmed 15 days ago
C
Retailer 6
-
£6,338 GBP
View
Most Expensive
NZ Jewellers
d14b72df-1e22-4eab-a89e-616233642b41 · Oct 18
£6,655 GBP
$8,931 USD
View
Price last confirmed 16 days ago
6 more retailers have this diamond
Prices start from £2,693 GBPSave up to £3,645 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
£2,693 GBP