Round|Natural|GIA

1.51ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 2231826354

Certificate GIA 2231826354

Diamond specifications and retailer prices

From $15,660 NZD

$8,811 USD

As of November 1, 2026

Save $13,036 NZD (45%) vs most expensive(unlock to see where)

22 retailers carry this diamond

Most expensive: $28,696 NZD at NZ Jewellers · As of November 2, 2026

View at NZ Jewellers

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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2231826354. Listed at 22 retailers as of November 1, 2026, with prices from $15,660 to $28,696, a $13,036 spread on the same certified stone. NZ Jewellers lists it at $28,696. 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

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle36.5°

Pavilion angle41°

OriginNatural

Grading LabGIA

CertificateGIA 2231826354

Dimensions7.27 × 7.32 × 4.58 mm

L/W Ratio1.01

Girdle conditionSlightly Thick

Key to symbols

Cloud, Crystal, Feather, Needle

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateGIA 2231826354

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: $28,696 NZD|Low: $15,660 NZD|High: $28,696 NZD|Avg: $19,632 NZD

NZ Jewellers

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

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Retailer 11

Retailer 12

Retailer 13

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Retailer 16

Retailer 17

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Retailer 21

Retailer 22

November 3, 2026

Retailer 9$15,660 NZD

Retailer 12$15,974 NZD

Retailer 11$16,396 NZD

Retailer 22$16,437 NZD

Retailer 5$17,044 NZD

Retailer 7$17,215 NZD

Retailer 4$18,363 NZD

Retailer 13$18,719 NZD

Retailer 18$18,939 NZD

Retailer 3$19,158 NZD

Retailer 6$19,159 NZD

Retailer 17$19,177 NZD

Retailer 19$19,809 NZD

Retailer 8$20,208 NZD

Retailer 10$20,208 NZD

Retailer 14$20,883 NZD

Retailer 2$20,944 NZD

Retailer 16$21,315 NZD

Retailer 15$21,983 NZD

Retailer 21$25,295 NZD

Retailer 20$26,890 NZD

NZ Jewellers$28,696 NZD

7 data points across 22 retailers

22 retailers$15,660 NZD to $28,696 NZD

B+

Cheapest Retailer

$15,660 NZD

$8,811 USD

B+

Retailer 2

$15,974 NZD

$8,988 USD

View

B+

Retailer 3

$16,139 NZD

A$13,970 AUD

View

B+

Retailer 4

$16,396 NZD

$9,225 USD

View

B+

Retailer 5

$16,437 NZD

$9,248 USD

View

B+

Retailer 6

$17,044 NZD

$9,590 USD

View

B+

Retailer 7

$17,215 NZD

$9,686 USD

View

Final sale: no returns

B+

Retailer 8

$17,243 NZD

$9,702 USD

View

B+

Retailer 9

$18,363 NZD

$10,332 USD

View

B+

Retailer 10

$18,719 NZD

£8,293 GBP

View

Retailer 11

$18,939 NZD

$10,656 USD

View

B+

Retailer 12

$19,158 NZD

$10,779 USD

View

B+

Retailer 13

$19,177 NZD

$10,790 USD

View

B+

Retailer 14

$19,809 NZD

£8,776 GBP

View

B+

Retailer 15

$20,208 NZD

$11,370 USD

View

B+

Retailer 16

$20,208 NZD

$11,370 USD

View

B+

Retailer 17

$20,883 NZD

$11,750 USD

View

Retailer 18

$20,944 NZD

$11,784 USD

View

B+

Retailer 19

$21,315 NZD

€11,422 EUR

View

Retailer 20

$25,295 NZD

ZAR 229,920 ZAR

View

Retailer 21

$26,890 NZD

£11,913 GBP

View

Most Expensive

NZ Jewellers

7f99f642-1df0-480d-bbcf-61c86faa58f3 · Nov 2

$28,696 NZD

$16,146 USD

View

21 more retailers have this diamond

Prices start from $15,660 NZDSave up to $13,036 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 Round

$15,660 NZD