CaratHunter
Plans
Heart|Natural|GIA

1.51ct L SI2 Heart Natural Diamond

EX • L/SI2 • GIA 6421737922

Certificate GIA 6421737922

Diamond specifications and retailer prices

From $2,490 AUD
As of November 4, 2026
Save $4,174 AUD (63%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $6,664 AUD 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 L colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6421737922. Listed at 10 retailers as of November 4, 2026, with prices from $2,490 to $6,664, a $4,174 spread on the same certified stone. NZ Jewellers lists it at $6,664. 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
L
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6421737922
Dimensions7.17 × 8.04 × 4.41 mm
L/W Ratio1.12
Top View
7.17 mm8.04 mm1.51 ctL / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6421737922
Side View
Table 56.0%CrownGirdlePavilionCulet: NoneDepth 54.8%

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 4
Current: $6,664 AUD|Low: $2,490 AUD|High: $7,150 AUD|Avg: $3,341 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 7$2,490 AUD
Retailer 5$2,733 AUD
Retailer 6$2,733 AUD
Retailer 2$2,758 AUD
Retailer 10$2,858 AUD
Retailer 9$2,933 AUD
Retailer 3$2,966 AUD
Retailer 8$3,152 AUD
Retailer 4$3,705 AUD
NZ Jewellers$6,664 AUD

44 data points across 10 retailers

10 retailers$2,490 AUD to $6,664 AUD

A
Cheapest Retailer
-
$2,490 AUD
A
Retailer 2
-
$2,733 AUD
View
Retailer 3
-
$2,733 AUD
View
Price last confirmed 8 days ago
A
Retailer 4
-
$2,758 AUD
View
B+
Retailer 5
-
$2,858 AUD
View
A
Retailer 6
-
$2,933 AUD
View
A
Retailer 7
-
$2,966 AUD
View
A
Retailer 8
-
$3,152 AUD
View
B+
Retailer 9
-
$3,705 AUD
View
Most Expensive
B
NZ Jewellers
99d9a3c3-9351-4950-8825-9db039e73134 · Nov 5
$6,664 AUD
$4,579 USD
View
9 more retailers have this diamond
Prices start from $2,490 AUDSave up to $4,174 AUD

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
$2,490 AUD