Oval|Natural|GIA

1.51ct H SI1 Oval Natural Diamond

EX • H/SI1 • GIA 2427623450

Certificate GIA 2427623450

Diamond specifications and retailer prices

From $9,824 AUD

$6,885 USD

As of October 28, 2026

Save $11,455 AUD (54%) vs most expensive(unlock to see where)

19 retailers carry this diamond

Most expensive: $21,279 AUD 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 $9,824 to $21,279, a $11,455 spread on the same certified stone. NZ Jewellers lists it at $21,279. 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: $11,862 AUD|Low: $9,824 AUD|High: $17,946 AUD|Avg: $12,382 AUD|-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$9,824 AUD

Retailer 2$9,963 AUD

Retailer 11$10,616 AUD

Retailer 10$10,729 AUD

Retailer 3$11,703 AUD

Retailer 1$11,862 AUD

Retailer 4$12,058 AUD

Retailer 7$12,064 AUD

Retailer 6$13,176 AUD

Retailer 8$15,354 AUD

Retailer 5$17,826 AUD

35 data points across 11 retailers

19 retailers$9,824 AUD to $21,279 AUD

B+

Cheapest Retailer

$9,824 AUD

$6,885 USD

B+

Retailer 2

$9,963 AUD

$6,982 USD

View

Retailer 3

$10,616 AUD

$7,440 USD

View

Price last confirmed 6 days ago

Retailer 4

$10,640 AUD

$7,457 USD

View

Price last confirmed 8 days ago

Retailer 5

$10,729 AUD

$7,519 USD

View

Retailer 6

$11,526 AUD

$8,078 USD

View

Price last confirmed 7 days ago

Retailer 7

$11,703 AUD

$8,202 USD

View

Price last confirmed 8 days ago

B+

Retailer 8

$11,862 AUD

£6,546 GBP

View

Retailer 9

$11,896 AUD

$8,337 USD

View

B+

Retailer 10

$12,058 AUD

£6,654 GBP

View

Retailer 11

$12,064 AUD

View

Price last confirmed 10 days ago

Retailer 12

$12,671 AUD

$8,880 USD

View

Retailer 13

$12,671 AUD

$8,880 USD

View

Retailer 14

$13,085 AUD

$9,170 USD

View

Retailer 15

$13,176 AUD

€8,794 EUR

View

Retailer 16

$13,300 AUD

$9,321 USD

View

Retailer 17

$15,354 AUD

ZAR 173,840 ZAR

View

Price last confirmed 11 days ago

Retailer 18

$17,826 AUD

£9,837 GBP

View

Most Expensive

NZ Jewellers

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

$21,279 AUD

$14,913 USD

View

18 more retailers have this diamond

Prices start from $9,824 AUDSave up to $11,455 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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B+

1.51ct Oval

$9,824 AUD