Oval|Natural|GIA

1.51ct H SI1 Oval Natural Diamond

EX • H/SI1 • GIA 2427623450

Certificate GIA 2427623450

Diamond specifications and retailer prices

From $12,237 NZD

$6,885 USD

As of October 28, 2026

Save $14,268 NZD (54%) vs most expensive(unlock to see where)

19 retailers carry this diamond

Most expensive: $26,505 NZD at NZ Jewellers · As of October 27, 2026

View at NZ Jewellers

About this 1.51ct natural oval diamond

This 1.51ct natural oval sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2427623450. Listed at 19 retailers as of October 27, 2026, with prices from $12,237 to $26,505, a $14,268 spread on the same certified stone. NZ Jewellers lists it at $26,505. 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

SI1

Clarity

Excellent

Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent

PolishExcellent

SymmetryVery Good

FluorescenceNone

OriginNatural

Grading LabGIA

CertificateGIA 2427623450

Dimensions9.06 × 6.55 × 4.13 mm

L/W Ratio1.38

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutExcellent

PolishExcellent

SymmetryVery Good

FluorescenceNone

CertificateGIA 2427623450

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: Oct 28

Current: $14,775 NZD|Low: $12,237 NZD|High: $22,353 NZD|Avg: $15,422 NZD|-1.1%

Retailer 1

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

October 29, 2026

Retailer 9$12,237 NZD

Retailer 2$12,409 NZD

Retailer 11$13,223 NZD

Retailer 10$13,364 NZD

Retailer 3$14,577 NZD

Retailer 1$14,775 NZD

Retailer 4$15,019 NZD

Retailer 7$15,027 NZD

Retailer 6$16,411 NZD

Retailer 8$19,125 NZD

Retailer 5$22,204 NZD

35 data points across 11 retailers

19 retailers$12,237 NZD to $26,505 NZD

B+

Cheapest Retailer

$12,237 NZD

$6,885 USD

B+

Retailer 2

$12,409 NZD

$6,982 USD

View

Retailer 3

$13,223 NZD

$7,440 USD

View

Price last confirmed 5 days ago

Retailer 4

$13,253 NZD

$7,457 USD

View

Price last confirmed 8 days ago

Retailer 5

$13,364 NZD

$7,519 USD

View

Retailer 6

$14,357 NZD

$8,078 USD

View

Price last confirmed 7 days ago

Retailer 7

$14,577 NZD

$8,202 USD

View

Price last confirmed 8 days ago

B+

Retailer 8

$14,775 NZD

£6,546 GBP

View

Retailer 9

$14,817 NZD

$8,337 USD

View

B+

Retailer 10

$15,019 NZD

£6,654 GBP

View

Retailer 11

$15,027 NZD

A$13,007 AUD

View

Price last confirmed 9 days ago

Retailer 12

$15,782 NZD

$8,880 USD

View

Retailer 13

$15,782 NZD

$8,880 USD

View

Retailer 14

$16,298 NZD

$9,170 USD

View

Retailer 15

$16,411 NZD

€8,794 EUR

View

Retailer 16

$16,566 NZD

$9,321 USD

View

Retailer 17

$19,125 NZD

ZAR 173,840 ZAR

View

Price last confirmed 11 days ago

Retailer 18

$22,204 NZD

£9,837 GBP

View

Most Expensive

NZ Jewellers

6af18481-3122-4a53-afef-cf2890653e4f · Oct 27

$26,505 NZD

$14,913 USD

View

18 more retailers have this diamond

Prices start from $12,237 NZDSave up to $14,268 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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B+

1.51ct Oval

$12,237 NZD