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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 $5,466 SGD
$4,274 USD
As of October 31, 2026
Save $1,040 SGD (16%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $6,506 SGD 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 $5,466 to $6,506, a $1,040 spread on the same certified stone. Blue Nile lists it at $6,506. 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
Colour
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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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $6,506 SGD|Low: $4,989 SGD|High: $7,506 SGD|Avg: $6,107 SGD|-13.3%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 5$5,466 SGD
Retailer 2$5,596 SGD
Retailer 4$5,653 SGD
Retailer 7$5,757 SGD
Retailer 3$5,833 SGD
Retailer 6$5,912 SGD
Blue Nile$6,506 SGD

42 data points across 7 retailers

7 retailers$5,466 SGD to $6,506 SGD

A
Cheapest Retailer
-
$5,466 SGD
$4,274 USD
A
Retailer 2
-
$5,596 SGD
₹416,746 INR
View
A
Retailer 3
-
$5,653 SGD
$4,420 USD
View
Final sale: no returns
A
Retailer 4
-
$5,757 SGD
MYR 18,336 MYR
View
A
Retailer 5
-
$5,833 SGD
£3,591 GBP
View
A
Retailer 6
-
$5,912 SGD
View
Most Expensive
A
Blue Nile
29530598 · Oct 31
$6,506 SGD
$5,087 USD
View
6 more retailers have this diamond
Prices start from $5,466 SGDSave up to $1,040 SGD

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
$5,466 SGD