Marquise|Natural|GIA

1.51ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 7566682513

Certificate GIA 7566682513

Diamond specifications and retailer prices

From $11,517 NZD

SGD 8,757 SGD

As of November 1, 2026

Save $7,070 NZD (38%) vs most expensive(unlock to see where)

14 retailers carry this diamond

Most expensive: $18,587 NZD at Helzberg Diamonds · As of November 1, 2026

View at Helzberg Diamonds

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded I 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 7566682513. Listed at 14 retailers as of November 1, 2026, with prices from $11,517 to $18,587, a $7,070 spread on the same certified stone. Helzberg Diamonds lists it at $18,587. 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

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle34.21°

Pavilion angle38.5°

OriginNatural

Grading LabGIA

CertificateGIA 7566682513

Dimensions11.51 × 6.08 × 3.55 mm

L/W Ratio1.89

Culet sizeNone

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateGIA 7566682513

Side View

Caratlytics Score

How it works →

Excellent

Excellent quality and great value

Unlock full score analysis

See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1

Current: $18,587 NZD|Low: $11,517 NZD|High: $18,587 NZD|Avg: $13,915 NZD

Helzberg Diamonds

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

Retailer 12

Retailer 13

November 3, 2026

Retailer 11$11,517 NZD

Retailer 5$11,947 NZD

Retailer 10$12,023 NZD

Retailer 8$12,187 NZD

Retailer 9$12,354 NZD

Retailer 2$12,813 NZD

Retailer 3$12,850 NZD

Retailer 4$14,379 NZD

Retailer 12$14,487 NZD

Retailer 13$14,575 NZD

Retailer 6$14,670 NZD

Retailer 7$16,326 NZD

Helzberg Diamonds$18,587 NZD

13 data points across 13 retailers

14 retailers$11,517 NZD to $18,587 NZD

Cheapest Retailer

$11,517 NZD

SGD 8,757 SGD

B+

Retailer 2

$11,947 NZD

$6,722 USD

View

B+

Retailer 3

$11,989 NZD

SGD 9,116 SGD

View

B+

Retailer 4

$12,023 NZD

$6,765 USD

View

B+

Retailer 5

$12,187 NZD

$6,857 USD

View

B+

Retailer 6

$12,354 NZD

$6,951 USD

View

B+

Retailer 7

$12,813 NZD

£5,676 GBP

View

B+

Retailer 8

$12,850 NZD

$7,230 USD

View

B+

Retailer 9

$14,379 NZD

$8,090 USD

View

B+

Retailer 10

$14,487 NZD

$8,151 USD

View

Retailer 11

$14,575 NZD

$8,201 USD

View

Price last confirmed 7 days ago

B+

Retailer 12

$14,670 NZD

€7,861 EUR

View

Retailer 13

$16,326 NZD

$9,186 USD

View

Most Expensive

Helzberg Diamonds

XZRNLMMMOILHJ · Nov 1

$18,587 NZD

$10,458 USD

View

13 more retailers have this diamond

Prices start from $11,517 NZDSave up to $7,070 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 Marquise

$11,517 NZD