Heart|Natural|GIA

1.51ct J SI2 Heart Natural Diamond

EX • J/SI2 • GIA 2235518191

Certificate GIA 2235518191

Diamond specifications and retailer prices

From $5,636 NZD

$3,171 USD

As of November 1, 2026

Save $6,329 NZD (53%) vs most expensive(unlock to see where)

17 retailers carry this diamond

Most expensive: $12,215 NZD 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 November 1, 2026, with a 112% 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: $11,965 NZD|Low: $4,605 NZD|High: $12,107 NZD|Avg: $6,956 NZD|+1.9%

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$4,605 NZD

Retailer 2$5,545 NZD

Retailer 8$5,636 NZD

Retailer 7$5,755 NZD

Retailer 6$5,982 NZD

Retailer 3$6,352 NZD

Retailer 9$6,601 NZD

Retailer 5$7,318 NZD

Retailer 4$8,092 NZD

Retailer 10$8,097 NZD

Retailer 1$11,965 NZD

41 data points across 11 retailers

17 retailers$5,636 NZD to $11,965 NZD

Retailer 1

$5,388 NZD

$3,032 USD

Price last confirmed 26 days ago

B+

Retailer 2

$5,636 NZD

$3,171 USD

View

B+

Retailer 3

$5,755 NZD

$3,238 USD

View

B+

Retailer 4

$5,982 NZD

$3,366 USD

View

Final sale: no returns

Retailer 5

$6,352 NZD

$3,574 USD

View

Price last confirmed 26 days ago

Retailer 6

$6,352 NZD

$3,574 USD

View

Price last confirmed 26 days ago

Retailer 7

$6,360 NZD

$3,579 USD

View

Price last confirmed 26 days ago

Retailer 8

$6,596 NZD

$3,711 USD

View

Price last confirmed 33 days ago

B+

Retailer 9

$6,601 NZD

$3,714 USD

View

Retailer 10

$7,318 NZD

£3,242 GBP

View

Retailer 11

$7,330 NZD

$4,124 USD

View

Price last confirmed 57 days ago

Retailer 12

$7,330 NZD

$4,124 USD

View

Price last confirmed 35 days ago

Retailer 13

$8,092 NZD

€4,336 EUR

View

Retailer 14

$8,097 NZD

$4,556 USD

View

Price last confirmed 10 days ago

Retailer 15

$10,132 NZD

$5,701 USD

View

Price last confirmed 26 days ago

Retailer 16

$11,965 NZD

£5,301 GBP

View

Most Expensive

NZ Jewellers

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

$12,215 NZD

$6,873 USD

View

Price last confirmed 33 days ago

16 more retailers have this diamond

Prices start from $5,636 NZDSave up to $6,329 NZD

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

$5,636 NZD