Round|Natural|GIA

1.51ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 3415658160

Certificate GIA 3415658160

Diamond specifications and retailer prices

From $13,680 NZD

$7,710 USD

As of October 31, 2026

Save $22,562 NZD (62%) vs most expensive(unlock to see where)

27 retailers carry this diamond

Most expensive: $36,241 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 3415658160. Listed at 27 retailers as of October 31, 2026, with prices from $13,680 to $36,241, a $22,562 spread on the same certified stone. Diamond Quarter lists it at $36,241. 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 angle33.5°

Pavilion angle41.4°

OriginNatural

Grading LabGIA

CertificateGIA 3415658160

Dimensions7.34 × 7.30 × 4.59 mm

L/W Ratio1.01

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateGIA 3415658160

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: Oct 31

Current: $16,310 NZD|Low: $13,680 NZD|High: $27,628 NZD|Avg: $18,761 NZD|-15.1%

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

Retailer 18

Retailer 19

Retailer 20

November 2, 2026

Retailer 6$13,680 NZD

Retailer 8$13,753 NZD

Retailer 4$14,187 NZD

Retailer 19$14,429 NZD

Retailer 9$14,609 NZD

Retailer 17$15,055 NZD

Retailer 7$15,153 NZD

Retailer 5$16,153 NZD

Retailer 1$16,310 NZD

Retailer 16$16,835 NZD

Retailer 20$16,960 NZD

Retailer 2$17,583 NZD

Retailer 10$17,583 NZD

Retailer 3$18,169 NZD

Retailer 18$18,385 NZD

Retailer 12$18,807 NZD

Retailer 13$19,228 NZD

Retailer 11$19,426 NZD

Retailer 15$22,262 NZD

Retailer 14$23,667 NZD

42 data points across 20 retailers

27 retailers$13,680 NZD to $36,241 NZD

Cheapest Retailer

$13,680 NZD

$7,710 USD

Retailer 2

$13,753 NZD

$7,751 USD

View

Retailer 3

$14,187 NZD

$7,996 USD

View

Retailer 4

$14,429 NZD

$8,132 USD

View

Retailer 5

$14,609 NZD

$8,234 USD

View

Retailer 6

$15,055 NZD

$8,485 USD

View

B+

Retailer 7

$15,153 NZD

$8,540 USD

View

Final sale: no returns

B+

Retailer 8

$16,153 NZD

$9,104 USD

View

B+

Retailer 9

$16,310 NZD

£7,238 GBP

View

B+

Retailer 10

$16,835 NZD

$9,488 USD

View

B+

Retailer 11

$16,960 NZD

$9,558 USD

View

Retailer 12

$17,479 NZD

$9,851 USD

View

Price last confirmed 17 days ago

B+

Retailer 13

$17,583 NZD

$9,910 USD

View

B+

Retailer 14

$17,583 NZD

$9,910 USD

View

B+

Retailer 15

$18,169 NZD

$10,240 USD

View

B+

Retailer 16

$18,385 NZD

$10,362 USD

View

B+

Retailer 17

$18,807 NZD

€10,095 EUR

View

Retailer 18

$18,935 NZD

$10,672 USD

View

Price last confirmed 11 days ago

Retailer 19

$19,228 NZD

$10,837 USD

View

Price last confirmed 10 days ago

Retailer 20

$19,426 NZD

A$16,844 AUD

View

Price last confirmed 29 days ago

Retailer 21

$19,475 NZD

$10,976 USD

View

Price last confirmed 18 days ago

Retailer 22

$21,849 NZD

$12,314 USD

View

Price last confirmed 12 days ago

B+

Retailer 23

$22,262 NZD

ZAR 202,693 ZAR

View

Retailer 24

$23,667 NZD

£10,503 GBP

View

Retailer 25

$29,132 NZD

$16,419 USD

View

Price last confirmed 12 days ago

Retailer 26

$34,573 NZD

£15,343 GBP

View

Most Expensive

Diamond Quarter

1.51SI1D34607BA3N · Oct 31

$36,241 NZD

£16,083 GBP

View

26 more retailers have this diamond

Prices start from $13,680 NZDSave up to $22,562 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

$13,680 NZD