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Heart|Natural|GIA

1.51ct F SI1 Heart Natural Diamond

EX • F/SI1 • GIA 5553605892

Certificate GIA 5553605892

Diamond specifications and retailer prices

From $4,274 USD
As of October 31, 2026
Save $813 USD (16%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $5,087 USD at Blue Nile · As of October 31, 2026
View at Blue Nile

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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5553605892. Listed at 7 retailers as of October 31, 2026, with prices from $4,274 to $5,087, a $813 spread on the same certified stone. Blue Nile lists it at $5,087. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5553605892
Dimensions6.82 × 8.12 × 4.51 mm
L/W Ratio1.19
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Indented Natural
Top View
6.82 mm8.12 mm1.51 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5553605892
Side View
Table 59.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 55.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 31
Current: $5,087 USD|Low: $3,901 USD|High: $5,869 USD|Avg: $4,775 USD|-13.3%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 5$4,274 USD
Retailer 2$4,376 USD
Retailer 4$4,420 USD
Retailer 7$4,501 USD
Retailer 3$4,561 USD
Retailer 6$4,623 USD
Blue Nile$5,087 USD

42 data points across 7 retailers

7 retailers$4,274 USD to $5,087 USD

A
Cheapest Retailer
-
$4,274 USD
A
Retailer 2
-
$4,376 USD
₹416,746 INR
View
A
Retailer 3
-
$4,420 USD
View
Final sale: no returns
A
Retailer 4
-
$4,501 USD
MYR 18,336 MYR
View
A
Retailer 5
-
$4,561 USD
£3,591 GBP
View
A
Retailer 6
-
$4,623 USD
SGD 6,247 SGD
View
Most Expensive
A
Blue Nile
29530598 · Oct 31
$5,087 USD
View
6 more retailers have this diamond
Prices start from $4,274 USDSave up to $813 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
$4,274 USD