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Heart|Natural|GIA

1.51ct K SI2 Heart Natural Diamond

VG • K/SI2 • GIA 5231702396

Certificate GIA 5231702396

Diamond specifications and retailer prices

From $3,314 AUD
As of November 1, 2026
Save $3,615 AUD (52%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $6,929 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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 5231702396. Listed at 6 retailers as of November 1, 2026, with prices from $3,314 to $6,929, a $3,615 spread on the same certified stone. NZ Jewellers lists it at $6,929. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
K
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36.76°
Pavilion angle39.2°
OriginNatural
Grading LabGIA
CertificateGIA 5231702396
Dimensions7.10 × 8.09 × 4.52 mm
L/W Ratio1.14
Top View
7.10 mm8.09 mm1.51 ctK / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5231702396
Side View
Table 65.0%Crown 36.76°GirdlePavilion 39.2°CuletDepth 55.8%

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 1
Current: $6,929 AUD|Low: $3,314 AUD|High: $7,095 AUD|Avg: $4,271 AUD|-2.3%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 6$3,314 AUD
Retailer 3$3,320 AUD
Retailer 7$3,366 AUD
Retailer 4$3,377 AUD
Retailer 5$3,467 AUD
Retailer 8$3,873 AUD
Retailer 2$5,807 AUD
NZ Jewellers$6,929 AUD

28 data points across 8 retailers

6 retailers$3,314 AUD to $6,929 AUD

B+
Cheapest Retailer
-
$3,314 AUD
A
Retailer 2
-
$3,320 AUD
View
B+
Retailer 3
-
$3,377 AUD
View
A
Retailer 4
-
$3,467 AUD
View
B
Retailer 5
-
$5,807 AUD
View
Most Expensive
B
NZ Jewellers
0c10475e-b2b2-4a52-9d4f-29eae574bb71 · Nov 3
$6,929 AUD
$4,761 USD
View
5 more retailers have this diamond
Prices start from $3,314 AUDSave up to $3,615 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
$3,314 AUD