Round|Natural|GIA

1.50ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 6505156143

Certificate GIA 6505156143

Diamond specifications and retailer prices

From $15,827 NZD

$8,920 USD

As of November 1, 2026

Save $16,773 NZD (51%) vs most expensive(unlock to see where)

33 retailers carry this diamond

Most expensive: $32,600 NZD at Diamond Quarter · As of October 31, 2026

View at Diamond Quarter

About this 1.5ct natural round diamond

This 1.5ct 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 6505156143. Listed at 33 retailers as of October 31, 2026, with prices from $15,827 to $32,600, a $16,773 spread on the same certified stone. Diamond Quarter lists it at $32,600. 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

1.50

Carat

Colour

SI1

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle32°

Pavilion angle41°

OriginNatural

Grading LabGIA

CertificateGIA 6505156143

Dimensions7.42 × 7.38 × 4.43 mm

L/W Ratio1.01

Star length50%

Lower girdle80%

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateGIA 6505156143

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: $28,248 NZD|Low: $14,404 NZD|High: $30,147 NZD|Avg: $20,527 NZD|-0.9%

Retailer 1

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

November 1, 2026

Retailer 16$15,827 NZD

Retailer 4$16,215 NZD

Retailer 15$17,285 NZD

Retailer 7$17,837 NZD

Retailer 2$18,087 NZD

Retailer 8$18,087 NZD

Retailer 9$19,331 NZD

Retailer 12$19,399 NZD

Retailer 17$19,897 NZD

Retailer 14$19,922 NZD

Retailer 5$20,165 NZD

Retailer 10$20,812 NZD

Retailer 11$22,384 NZD

Retailer 6$22,610 NZD

Retailer 13$26,573 NZD

Retailer 1$28,248 NZD

Retailer 3$30,147 NZD

32 data points across 17 retailers

33 retailers$15,827 NZD to $32,600 NZD

Cheapest Retailer

$15,827 NZD

$8,920 USD

B+

Retailer 2

$16,215 NZD

$9,139 USD

View

B+

Retailer 3

$16,466 NZD

$9,280 USD

View

B+

Retailer 4

$16,783 NZD

$9,459 USD

View

B+

Retailer 5

$17,241 NZD

$9,717 USD

View

B+

Retailer 6

$17,285 NZD

$9,742 USD

View

B+

Retailer 7

$17,837 NZD

CA$13,962 CAD

View

B+

Retailer 8

$17,885 NZD

$10,080 USD

View

B+

Retailer 9

$18,087 NZD

$10,194 USD

View

Final sale: no returns

B+

Retailer 10

$18,087 NZD

$10,194 USD

View

B+

Retailer 11

$19,294 NZD

$10,874 USD

View

B+

Retailer 12

$19,331 NZD

$10,895 USD

View

B+

Retailer 13

$19,399 NZD

£8,609 GBP

View

B+

Retailer 14

$19,595 NZD

$11,044 USD

View

B+

Retailer 15

$19,897 NZD

$11,214 USD

View

Retailer 16

$19,922 NZD

A$17,274 AUD

View

Price last confirmed 8 days ago

B+

Retailer 17

$20,078 NZD

$11,316 USD

View

B+

Retailer 18

$20,079 NZD

$11,316 USD

View

B+

Retailer 19

$20,165 NZD

$11,365 USD

View

Retailer 20

$20,211 NZD

$11,391 USD

View

Price last confirmed 9 days ago

B+

Retailer 21

$20,812 NZD

£9,236 GBP

View

Retailer 22

$21,185 NZD

$11,940 USD

View

Retailer 23

$21,185 NZD

$11,940 USD

View

Retailer 24

$21,558 NZD

$12,150 USD

View

Retailer 25

$21,561 NZD

$12,152 USD

View

Retailer 26

$21,877 NZD

$12,330 USD

View

Retailer 27

$22,023 NZD

$12,412 USD

View

Retailer 28

$22,384 NZD

€12,015 EUR

View

Retailer 29

$22,610 NZD

$12,743 USD

View

Retailer 30

$26,573 NZD

ZAR 241,949 ZAR

View

Retailer 31

$28,248 NZD

£12,536 GBP

View

Retailer 32

$30,147 NZD

$16,991 USD

View

Most Expensive

Diamond Quarter

1.5SI1D65439546KG · Oct 31

$32,600 NZD

£14,467 GBP

View

32 more retailers have this diamond

Prices start from $15,827 NZDSave up to $16,773 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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