CaratHunter
Plans
Heart|Natural|GIA

1.51ct I SI1 Heart Natural Diamond

EX • I/SI1 • GIA 2556435166

Certificate GIA 2556435166

Diamond specifications and retailer prices

From $4,907 SGD
As of November 6, 2026
Save $5,662 SGD (54%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $11,959 SGD at NZ Jewellers · As of September 25, 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2556435166. Listed at 17 retailers as of November 4, 2026, with a 115% 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556435166
Dimensions6.83 × 7.97 × 4.68 mm
L/W Ratio1.17
Girdle conditionFaceted
Top View
6.83 mm7.97 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556435166
Side View
Table 58.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 58.7%

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: Nov 6
Current: $5,572 SGD|Low: $4,848 SGD|High: $11,228 SGD|Avg: $6,643 SGD|-4.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 6, 2026
Retailer 5$4,907 SGD
Retailer 3$4,953 SGD
Retailer 12$5,275 SGD
Retailer 6$5,516 SGD
Retailer 11$5,530 SGD
Retailer 4$5,565 SGD
Retailer 1$5,572 SGD
Retailer 14$5,690 SGD
Retailer 15$5,947 SGD
Retailer 8$6,209 SGD
Retailer 2$6,380 SGD
Retailer 7$7,041 SGD
Retailer 9$8,118 SGD
Retailer 13$10,252 SGD
Retailer 10$10,569 SGD

28 data points across 15 retailers

17 retailers$4,907 SGD to $10,569 SGD

A
Cheapest Retailer
-
$4,907 SGD
A
Retailer 2
-
$4,953 SGD
View
A
Retailer 3
-
$5,275 SGD
View
A
Retailer 4
-
$5,516 SGD
View
A
Retailer 5
-
$5,530 SGD
View
A
Retailer 6
-
$5,565 SGD
View
Final sale: no returns
A
Retailer 7
-
$5,572 SGD
View
A
Retailer 8
-
$5,690 SGD
View
B+
Retailer 9
-
$5,947 SGD
View
B+
Retailer 10
-
$6,209 SGD
View
B+
Retailer 11
-
$6,380 SGD
View
Retailer 12
-
$7,041 SGD
View
Price last confirmed 29 days ago
B+
Retailer 13
-
$7,095 SGD
View
B+
Retailer 14
-
$8,118 SGD
View
B
Retailer 15
-
$10,252 SGD
View
B
Retailer 16
-
$10,569 SGD
View
Most Expensive
NZ Jewellers
97ff1fbe-ddc2-4b37-a53f-63da8904c8ed · Sep 25
$11,959 SGD
$9,331 USD
View
Price last confirmed 42 days ago
16 more retailers have this diamond
Prices start from $4,907 SGDSave up to $5,662 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
$4,907 SGD