Marquise|Natural|GIA

1.51ct G SI1 Marquise Natural Diamond

EX • G/SI1 • GIA 6551543873

Certificate GIA 6551543873

Diamond specifications and retailer prices

From $13,516 AUD

$9,472 USD

As of November 1, 2026

Save $10,763 AUD (44%) vs most expensive(unlock to see where)

17 retailers carry this diamond

Most expensive: $24,279 AUD at NZ Jewellers · As of October 30, 2026

View at NZ Jewellers

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded G 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 6551543873. Listed at 17 retailers as of October 30, 2026, with prices from $13,516 to $24,279, a $10,763 spread on the same certified stone. NZ Jewellers lists it at $24,279. 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

SymmetryExcellent

FluorescenceFaint

Crown angle36.97°

Pavilion angle41.43°

OriginNatural

Grading LabGIA

CertificateGIA 6551543873

Dimensions11.30 × 5.97 × 3.78 mm

L/W Ratio1.89

Culet sizeNone

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceFaint

CertificateGIA 6551543873

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: $16,413 AUD|Low: $15,605 AUD|High: $23,025 AUD|Avg: $17,941 AUD|-1.2%

Retailer 1

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

November 2, 2026

Retailer 3$15,605 AUD

Retailer 9$15,782 AUD

Retailer 8$16,024 AUD

Retailer 7$16,199 AUD

Retailer 1$16,413 AUD

Retailer 6$16,703 AUD

Retailer 2$18,349 AUD

Retailer 5$21,401 AUD

Retailer 4$22,752 AUD

43 data points across 9 retailers

17 retailers$13,516 AUD to $24,279 AUD

B+

Cheapest Retailer

$13,516 AUD

$9,472 USD

B+

Retailer 2

$14,405 AUD

$10,095 USD

View

Retailer 3

$14,567 AUD

$10,209 USD

View

Price last confirmed 17 days ago

Retailer 4

$14,689 AUD

$10,294 USD

View

Price last confirmed 11 days ago

B+

Retailer 5

$15,539 AUD

$10,890 USD

View

B+

Retailer 6

$15,605 AUD

£8,611 GBP

View

B+

Retailer 7

$15,782 AUD

$11,060 USD

View

Retailer 8

$16,024 AUD

$11,230 USD

View

Retailer 9

$16,199 AUD

View

Price last confirmed 29 days ago

B+

Retailer 10

$16,413 AUD

£9,057 GBP

View

B+

Retailer 11

$16,703 AUD

$11,706 USD

View

Retailer 12

$18,209 AUD

$12,761 USD

View

Retailer 13

$18,349 AUD

€12,247 EUR

View

Retailer 14

$19,165 AUD

$13,431 USD

View

Price last confirmed 10 days ago

Retailer 15

$21,401 AUD

ZAR 242,301 ZAR

View

Retailer 16

$22,752 AUD

£12,555 GBP

View

Most Expensive

NZ Jewellers

04e58fd2-03b5-4f0a-8a02-4f720a580b04 · Oct 30

$24,279 AUD

$17,015 USD

View

16 more retailers have this diamond

Prices start from $13,516 AUDSave up to $10,763 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 Marquise

$13,516 AUD