Heart|Natural|GIA

1.51ct J SI2 Heart Natural Diamond

EX • J/SI2 • GIA 2235518191

Certificate GIA 2235518191

Diamond specifications and retailer prices

From $4,525 AUD

$3,171 USD

As of November 1, 2026

Save $5,132 AUD (53%) vs most expensive(unlock to see where)

17 retailers carry this diamond

Most expensive: $9,807 AUD at NZ Jewellers · As of September 30, 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 J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2235518191. Listed at 17 retailers as of October 29, 2026, with a 113% 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

Colour

SI2

Clarity

Excellent

Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent

PolishGood

SymmetryGood

FluorescenceNone

OriginNatural

Grading LabGIA

CertificateGIA 2235518191

Dimensions7.29 × 7.67 × 4.09 mm

L/W Ratio1.05

Culet sizeNone

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutExcellent

PolishGood

SymmetryGood

FluorescenceNone

CertificateGIA 2235518191

Side View

Caratlytics Score

How it works →

B+

Very Good

Strong quality and value balance

Unlock full score analysis

See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1

Current: $6,496 AUD|Low: $3,697 AUD|High: $9,720 AUD|Avg: $5,573 AUD|+7.3%

Retailer 1

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

November 2, 2026

Retailer 11$3,697 AUD

Retailer 2$4,452 AUD

Retailer 8$4,525 AUD

Retailer 7$4,620 AUD

Retailer 6$4,803 AUD

Retailer 3$5,100 AUD

Retailer 9$5,300 AUD

Retailer 4$5,875 AUD

Retailer 1$6,496 AUD

Retailer 10$6,501 AUD

Retailer 5$9,657 AUD

42 data points across 11 retailers

17 retailers$4,525 AUD to $9,657 AUD

Retailer 1

$4,326 AUD

$3,032 USD

Price last confirmed 26 days ago

B+

Retailer 2

$4,525 AUD

$3,171 USD

View

B+

Retailer 3

$4,620 AUD

$3,238 USD

View

B+

Retailer 4

$4,803 AUD

$3,366 USD

View

Final sale: no returns

Retailer 5

$5,100 AUD

$3,574 USD

View

Price last confirmed 25 days ago

Retailer 6

$5,100 AUD

$3,574 USD

View

Price last confirmed 25 days ago

Retailer 7

$5,106 AUD

$3,579 USD

View

Price last confirmed 26 days ago

Retailer 8

$5,295 AUD

$3,711 USD

View

Price last confirmed 32 days ago

B+

Retailer 9

$5,300 AUD

$3,714 USD

View

Retailer 10

$5,875 AUD

£3,242 GBP

View

Retailer 11

$5,885 AUD

$4,124 USD

View

Price last confirmed 56 days ago

Retailer 12

$5,885 AUD

$4,124 USD

View

Price last confirmed 34 days ago

Retailer 13

$6,496 AUD

€4,336 EUR

View

Retailer 14

$6,501 AUD

$4,556 USD

View

Price last confirmed 10 days ago

Retailer 15

$8,134 AUD

$5,701 USD

View

Price last confirmed 25 days ago

Retailer 16

$9,657 AUD

£5,329 GBP

View

Most Expensive

NZ Jewellers

7a9a62d6-a97d-4169-b6cc-b6d427851887 · Sep 30

$9,807 AUD

$6,873 USD

View

Price last confirmed 33 days ago

16 more retailers have this diamond

Prices start from $4,525 AUDSave up to $5,132 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.

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1.51ct Heart

$4,525 AUD