Round|Natural|GIA

1.51ct D SI2 Round Natural Diamond

EX • D/SI2 • GIA 6392613089

Certificate GIA 6392613089

Diamond specifications and retailer prices

From $18,737 NZD

$10,560 USD

As of October 25, 2026

Save $18,062 NZD (49%) vs most expensive(unlock to see where)

18 retailers carry this diamond

Most expensive: $36,799 NZD at Diamond Quarter · As of October 31, 2026

View at Diamond Quarter

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6392613089. Listed at 18 retailers as of October 25, 2026, with prices from $18,737 to $36,799, a $18,062 spread on the same certified stone. Diamond Quarter lists it at $36,799. 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

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceFaint

OriginNatural

Grading LabGIA

CertificateGIA 6392613089

Dimensions7.34 × 7.29 × 4.55 mm

L/W Ratio1.01

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceFaint

CertificateGIA 6392613089

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 25

Current: $22,780 NZD|Low: $17,668 NZD|High: $35,339 NZD|Avg: $25,219 NZD|-0.3%

Retailer 1

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

October 31, 2026

Retailer 5$18,737 NZD

Retailer 6$21,203 NZD

Retailer 8$21,203 NZD

Retailer 1$22,780 NZD

Retailer 2$22,970 NZD

Retailer 7$23,323 NZD

Retailer 3$25,663 NZD

Retailer 9$26,504 NZD

Retailer 4$33,291 NZD

Retailer 10$35,339 NZD

41 data points across 10 retailers

18 retailers$18,737 NZD to $36,799 NZD

B+

Cheapest Retailer

$18,737 NZD

$10,560 USD

B+

Retailer 2

$19,345 NZD

$10,903 USD

View

B+

Retailer 3

$19,672 NZD

$11,087 USD

View

B+

Retailer 4

$19,967 NZD

CA$15,630 CAD

View

B+

Retailer 5

$21,203 NZD

$11,950 USD

View

B+

Retailer 6

$21,203 NZD

$11,950 USD

View

Final sale: no returns

B+

Retailer 7

$22,780 NZD

£10,109 GBP

View

Retailer 8

$22,970 NZD

$12,946 USD

View

Retailer 9

$23,323 NZD

$13,145 USD

View

Retailer 10

$24,521 NZD

$13,820 USD

View

Retailer 11

$24,521 NZD

$13,820 USD

View

Retailer 12

$24,547 NZD

$13,835 USD

View

Retailer 13

$25,337 NZD

$14,280 USD

View

Retailer 14

$25,663 NZD

€13,775 EUR

View

Retailer 15

$26,504 NZD

$14,938 USD

View

Retailer 16

$33,291 NZD

£14,774 GBP

View

Retailer 17

$35,339 NZD

$19,917 USD

View

Most Expensive

Diamond Quarter

1.51SI2D638976D1N · Oct 31

$36,799 NZD

£16,331 GBP

View

17 more retailers have this diamond

Prices start from $18,737 NZDSave up to $18,062 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 Round

$18,737 NZD