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Heart|Natural|GIA

1.51ct L SI1 Heart Natural Diamond

EX • L/SI1 • GIA 7536538529

Certificate GIA 7536538529

Diamond specifications and retailer prices

From $2,671 AUD
As of November 5, 2026
Save $4,104 AUD (61%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $6,775 AUD at NZ Jewellers · As of November 3, 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 7536538529. Listed at 6 retailers as of November 3, 2026, with prices from $2,671 to $6,775, a $4,104 spread on the same certified stone. NZ Jewellers lists it at $6,775. 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
FluorescenceFaint
Crown angle35.33°
Pavilion angle41.58°
OriginNatural
Grading LabGIA
CertificateGIA 7536538529
Dimensions7.11 × 7.98 × 4.65 mm
L/W Ratio1.12
Girdle conditionVery Thick
Key to symbols
Feather, Crystal, Etch Channel, Needle, Indented Natural
Top View
7.11 mm7.98 mm1.51 ctL / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 7536538529
Side View
Table 63.0%Crown 35.33°GirdlePavilion 41.58°CuletDepth 58.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $6,775 AUD|Low: $2,585 AUD|High: $6,894 AUD|Avg: $3,460 AUD|-1.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 2$2,671 AUD
Retailer 3$2,745 AUD
Retailer 6$2,778 AUD
Retailer 7$2,819 AUD
Retailer 4$2,845 AUD
Retailer 5$2,906 AUD
NZ Jewellers$6,775 AUD

40 data points across 7 retailers

6 retailers$2,671 AUD to $6,775 AUD

A
Cheapest Retailer
-
$2,671 AUD
A
Retailer 2
-
$2,745 AUD
View
A
Retailer 3
-
$2,778 AUD
View
A
Retailer 4
-
$2,845 AUD
View
B+
Retailer 5
-
$2,906 AUD
View
Most Expensive
C
NZ Jewellers
1cedb843-b85c-42c6-83fc-f902cef6d3da · Nov 3
$6,775 AUD
$4,655 USD
View
5 more retailers have this diamond
Prices start from $2,671 AUDSave up to $4,104 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
$2,671 AUD