Heart|Natural|GIA

1.51ct F SI2 Heart Natural Diamond

EX • F/SI2 • GIA 6542728816

Certificate GIA 6542728816

Diamond specifications and retailer prices

From $3,456 USD
As of November 6, 2026
Save $3,793 USD (52%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $8,471 USD at Queensmith · As of October 28, 2026
View at Queensmith

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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6542728816. Listed at 16 retailers as of November 4, 2026, with a 110% 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
Color
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6542728816
Dimensions7.06 × 8.02 × 4.60 mm
L/W Ratio1.14
Top View
7.06 mm8.02 mm1.51 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6542728816
Side View
Table 62.0%CrownGirdle: THN-VTKPavilionCulet: NoneDepth 57.4%

Caratlytics Score

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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 6
Current: $8,471 USD|Low: $3,417 USD|High: $8,636 USD|Avg: $5,163 USD|-1.9%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 6$3,456 USD
Retailer 2$3,677 USD
Retailer 7$4,212 USD
Retailer 9$4,391 USD
Retailer 4$4,445 USD
Retailer 3$4,493 USD
Retailer 8$4,713 USD
Retailer 5$7,249 USD
Queensmith$8,471 USD

41 data points across 9 retailers

16 retailers$3,456 USD to $7,249 USD

A
Cheapest Retailer
-
$3,456 USD
A
Retailer 2
-
$3,677 USD
View
A
Retailer 3
-
$4,212 USD
View
Final sale: no returns
A
Retailer 4
-
$4,391 USD
View
A
Retailer 5
-
$4,445 USD
View
A
Retailer 6
-
$4,493 USD
View
Retailer 7
-
$4,564 USD
View
Price last confirmed 21 days ago
Retailer 8
-
$4,564 USD
View
Price last confirmed 21 days ago
Retailer 9
-
$4,564 USD
View
Price last confirmed 19 days ago
A
Retailer 10
-
$4,596 USD
View
A
Retailer 11
-
$4,713 USD
View
B+
Retailer 12
-
$4,847 USD
View
Retailer 13
-
$5,266 USD
View
Price last confirmed 18 days ago
B+
Retailer 14
-
$7,249 USD
View
Retailer 15
-
$7,951 USD
View
Price last confirmed 19 days ago
Most Expensive
Queensmith
6542728816 · Oct 28
$8,471 USD
£6,670 GBP
View
Price last confirmed 9 days ago
15 more retailers have this diamond
Prices start from $3,456 USDSave up to $3,793 USD

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
$3,456 USD