Oval|Natural|GIA

1.51ct H SI1 Oval Natural Diamond

EX • H/SI1 • GIA 3555666374

Certificate GIA 3555666374

Diamond specifications and retailer prices

From $6,816 AUD

$4,788 USD

As of October 19, 2026

13 retailers carry this diamond

Most expensive: $16,202 AUD at NZ Jewellers · As of October 17, 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 3555666374. Listed at 13 retailers as of October 17, 2026. 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

SymmetryExcellent

FluorescenceNone

Crown angle37.2°

Pavilion angle37.6°

OriginNatural

Grading LabGIA

CertificateGIA 3555666374

Dimensions9.04 × 6.54 × 4.11 mm

L/W Ratio1.38

Girdle conditionFaceted

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateGIA 3555666374

Side View

Caratlytics Score

No score right now

No retailer has confirmed this stone recently, so we are not scoring it. Prices below are as of the date shown.

Price History

Last verified: Oct 19

Current: $16,202 AUD|Low: $6,816 AUD|High: $16,548 AUD|Avg: $9,787 AUD|-2.1%

NZ Jewellers

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

Retailer 12

Retailer 13

Retailer 14

Retailer 15

Retailer 16

Retailer 17

Retailer 18

Retailer 19

Retailer 20

October 21, 2026

Retailer 20$6,816 AUD

Retailer 13$6,979 AUD

Retailer 18$7,431 AUD

Retailer 9$7,801 AUD

Retailer 19$7,867 AUD

Retailer 17$7,944 AUD

Retailer 15$8,522 AUD

Retailer 7$8,776 AUD

Retailer 10$8,776 AUD

Retailer 2$9,067 AUD

Retailer 16$9,495 AUD

Retailer 12$9,703 AUD

Retailer 8$9,766 AUD

Retailer 4$9,833 AUD

Retailer 11$10,093 AUD

Retailer 5$10,507 AUD

Retailer 14$10,770 AUD

Retailer 6$11,759 AUD

Retailer 3$13,934 AUD

NZ Jewellers$16,202 AUD

30 data points across 20 retailers

13 retailers$6,816 AUD to $16,202 AUD

Retailer 1

$6,816 AUD

$4,788 USD

Price last confirmed 13 days ago

Retailer 2

$6,979 AUD

HK$38,300 HKD

View

Price last confirmed 12 days ago

Retailer 3

$7,431 AUD

$5,220 USD

View

Price last confirmed 13 days ago

Retailer 4

$8,522 AUD

$5,986 USD

View

Price last confirmed 12 days ago

Retailer 5

$8,776 AUD

$6,165 USD

View

Price last confirmed 16 days ago

Retailer 6

$8,776 AUD

$6,165 USD

View

Price last confirmed 17 days ago

Retailer 7

$9,067 AUD

£5,015 GBP

View

Price last confirmed 12 days ago

Retailer 8

$9,703 AUD

View

Price last confirmed 29 days ago

Retailer 9

$9,833 AUD

$6,907 USD

View

Price last confirmed 14 days ago

Retailer 10

$10,093 AUD

$7,090 USD

View

Price last confirmed 14 days ago

Retailer 11

$11,759 AUD

ZAR 133,442 ZAR

View

Price last confirmed 15 days ago

Retailer 12

$13,934 AUD

£7,707 GBP

View

Price last confirmed 14 days ago

Most Expensive

NZ Jewellers

1733883e-14a1-40c5-b683-c2c469e4271f · Oct 17

$16,202 AUD

$11,381 USD

View

Price last confirmed 15 days ago

12 more retailers have this diamond

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 Oval

$6,816 AUD