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Heart|Natural|GIA

1.51ct I SI2 Heart Natural Diamond

EX • I/SI2 • GIA 6552596091

Certificate GIA 6552596091

Diamond specifications and retailer prices

From $3,658 SGD
As of November 6, 2026
Save $4,409 SGD (55%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $8,485 SGD 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6552596091. Listed at 13 retailers as of November 4, 2026, with a 121% 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
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6552596091
Dimensions7.07 × 8.05 × 4.73 mm
L/W Ratio1.14
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity, Needle, Indented Natural
Top View
7.07 mm8.05 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552596091
Side View
Table 60.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 58.8%

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: Nov 6
Current: $3,861 SGD|Low: $3,641 SGD|High: $8,994 SGD|Avg: $5,258 SGD|-10.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 5$3,658 SGD
Retailer 1$3,861 SGD
Retailer 7$4,465 SGD
Retailer 3$4,678 SGD
Retailer 2$5,006 SGD
Retailer 6$5,024 SGD
Retailer 4$8,066 SGD

46 data points across 7 retailers

13 retailers$3,658 SGD to $8,066 SGD

A
Cheapest Retailer
-
$3,658 SGD
A
Retailer 2
-
$3,861 SGD
View
A
Retailer 3
-
$4,465 SGD
View
Final sale: no returns
A
Retailer 4
-
$4,678 SGD
View
Retailer 5
-
$4,870 SGD
View
Price last confirmed 21 days ago
Retailer 6
-
$4,870 SGD
View
Price last confirmed 19 days ago
A
Retailer 7
-
$4,880 SGD
View
A
Retailer 8
-
$5,006 SGD
View
A
Retailer 9
-
$5,024 SGD
View
Retailer 10
-
$5,057 SGD
View
Price last confirmed 21 days ago
Retailer 11
-
$5,620 SGD
View
Price last confirmed 18 days ago
B+
Retailer 12
-
$8,066 SGD
View
Most Expensive
NZ Jewellers
c725a9b8-881d-4e8d-8d4d-ccdb7f702b80 · Oct 18
$8,485 SGD
$6,621 USD
View
Price last confirmed 19 days ago
12 more retailers have this diamond
Prices start from $3,658 SGDSave up to $4,409 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
$3,658 SGD