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Heart|Natural|GIA

1.51ct L SI1 Heart Natural Diamond

EX • L/SI1 • GIA 6551311460

Certificate GIA 6551311460

Diamond specifications and retailer prices

From $2,682 AUD
As of November 6, 2026
Save $1,678 AUD (38%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $7,469 AUD 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 L colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551311460. Listed at 12 retailers as of November 5, 2026, with a 63% 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
L
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 6551311460
Dimensions7.32 × 8.27 × 4.48 mm
L/W Ratio1.13
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
7.32 mm8.27 mm1.51 ctL / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 6551311460
Side View
Table 64.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 54.2%

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: $7,469 AUD|Low: $2,663 AUD|High: $7,469 AUD|Avg: $3,796 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 5$2,682 AUD
Retailer 2$2,870 AUD
Retailer 10$3,347 AUD
Retailer 7$3,551 AUD
Retailer 8$3,573 AUD
Retailer 9$3,573 AUD
Retailer 3$3,780 AUD
Retailer 6$4,123 AUD
Retailer 4$4,360 AUD
NZ Jewellers$7,469 AUD

46 data points across 10 retailers

12 retailers$2,682 AUD to $4,360 AUD

A
Cheapest Retailer
-
$2,682 AUD
A
Retailer 2
-
$2,870 AUD
View
B+
Retailer 3
-
$3,347 AUD
View
B+
Retailer 4
-
$3,551 AUD
View
Retailer 5
-
$3,573 AUD
View
Price last confirmed 21 days ago
Retailer 6
-
$3,573 AUD
View
Price last confirmed 19 days ago
Retailer 7
-
$3,737 AUD
View
Price last confirmed 21 days ago
B+
Retailer 8
-
$3,780 AUD
View
B+
Retailer 9
-
$3,781 AUD
View
Retailer 10
-
$4,123 AUD
View
Price last confirmed 18 days ago
B
Retailer 11
-
$4,360 AUD
View
Most Expensive
NZ Jewellers
f404e1a2-cdbf-4ee4-ba0f-1532e6a78e46 · Oct 18
$7,469 AUD
$5,132 USD
View
Price last confirmed 19 days ago
11 more retailers have this diamond
Prices start from $2,682 AUDSave up to $1,678 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
$2,682 AUD