Heart|Natural|GIA

1.51ct I SI1 Heart Natural Diamond

EX • I/SI1 • GIA 6555506948

Certificate GIA 6555506948

Diamond specifications and retailer prices

From $3,481 USD
As of November 6, 2026
Save $4,665 USD (57%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $8,146 USD at NZ Jewellers · As of November 5, 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 6555506948. Listed at 18 retailers as of November 5, 2026, with prices from $3,481 to $8,146, a $4,665 spread on the same certified stone. NZ Jewellers lists it at $8,146. 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
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555506948
Dimensions7.00 × 7.88 × 4.58 mm
L/W Ratio1.13
Girdle conditionFaceted
Top View
7.00 mm7.88 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555506948
Side View
Table 59.0%CrownGirdle: MED-THKPavilionCulet: NDepth 58.2%

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: $8,146 USD|Low: $3,430 USD|High: $8,315 USD|Avg: $4,927 USD|-2.0%
NZ Jewellers
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
Retailer 16
Retailer 17
November 6, 2026
Retailer 16$3,481 USD
Retailer 4$3,496 USD
Retailer 14$3,717 USD
Retailer 6$3,904 USD
Retailer 8$3,909 USD
Retailer 3$3,910 USD
Retailer 2$3,956 USD
Retailer 9$4,025 USD
Retailer 15$4,330 USD
Retailer 11$4,345 USD
Retailer 10$4,412 USD
Retailer 5$4,483 USD
Retailer 12$5,704 USD
Retailer 17$5,930 USD
Retailer 7$7,255 USD
Retailer 13$7,426 USD
NZ Jewellers$8,146 USD

21 data points across 17 retailers

18 retailers$3,481 USD to $8,146 USD

A
Cheapest Retailer
-
$3,481 USD
A
Retailer 2
-
$3,496 USD
View
A
Retailer 3
-
$3,717 USD
View
A
Retailer 4
-
$3,904 USD
View
A
Retailer 5
-
$3,909 USD
View
A
Retailer 6
-
$3,910 USD
View
Final sale: no returns
A
Retailer 7
-
$3,956 USD
View
A
Retailer 8
-
$4,025 USD
View
A
Retailer 9
-
$4,330 USD
View
A
Retailer 10
-
$4,345 USD
View
A
Retailer 11
-
$4,412 USD
View
A
Retailer 12
-
$4,483 USD
View
Retailer 13
-
$5,039 USD
View
Price last confirmed 28 days ago
B+
Retailer 14
-
$5,704 USD
View
B
Retailer 15
-
$5,930 USD
View
B
Retailer 16
-
$7,255 USD
View
B
Retailer 17
-
$7,426 USD
View
Most Expensive
B
NZ Jewellers
28ec3ddb-0863-4b50-998a-7b353d1e8e5b · Nov 5
$8,146 USD
View
17 more retailers have this diamond
Prices start from $3,481 USDSave up to $4,665 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
$3,481 USD