Round|Lab Grown|IGI

4.51ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG754595249

Shape and cutting style on the report: Round brilliant

Certificate IGI LG754595249

Diamond specifications and retailer prices

From $6,570 NZD

$3,703 USD

As of October 29, 2026

Save $19,948 NZD (75%) vs most expensive(unlock to see where)

28 retailers carry this diamond

Most expensive: $26,519 NZD at With Clarity · As of October 31, 2026

View at With Clarity

About this 4.51ct lab-grown round diamond

This 4.51ct lab-grown round sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG754595249 or 754595249. Listed at 28 retailers as of October 29, 2026, with prices from $6,570 to $26,519, a $19,948 spread on the same certified stone. With Clarity lists it at $26,519. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

4.51

Carat

Colour

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle34.1°

Pavilion angle40.8°

OriginLab Grown

Grading LabIGI

CertificateIGI LG754595249

Dimensions10.65 × 10.69 × 6.50 mm

L/W Ratio1.00

Girdle conditionFaceted

Culet sizePointed

Cert comments

HEARTS & ARROWS As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II

View IGI Report →View Loupe360 Video →

Top View

OriginLab Grown

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG754595249

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 29

Current: $10,921 NZD|Low: $6,444 NZD|High: $49,042 NZD|Avg: $15,956 NZD|+2.3%

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

October 31, 2026

Retailer 10$6,570 NZD

Retailer 6$6,707 NZD

Retailer 8$9,030 NZD

Retailer 14$9,390 NZD

Retailer 12$9,395 NZD

Retailer 3$10,291 NZD

Retailer 1$10,921 NZD

Retailer 9$14,486 NZD

Retailer 11$14,681 NZD

Retailer 4$17,032 NZD

Retailer 13$17,346 NZD

Retailer 2$22,061 NZD

Retailer 5$24,210 NZD

Retailer 7$25,231 NZD

41 data points across 14 retailers

28 retailers$6,570 NZD to $26,519 NZD

Retailer 1

$5,868 NZD

$3,307 USD

Price last confirmed 32 days ago

Retailer 2

$6,384 NZD

$3,598 USD

View

Price last confirmed 25 days ago

Retailer 3

$6,384 NZD

$3,598 USD

View

Price last confirmed 37 days ago

Retailer 4

$6,384 NZD

$3,598 USD

View

Price last confirmed 17 days ago

Retailer 5

$6,570 NZD

$3,703 USD

View

Final sale: no returns

Retailer 6

$6,707 NZD

$3,780 USD

View

Retailer 7

$6,714 NZD

$3,784 USD

View

Price last confirmed 31 days ago

Retailer 8

$6,808 NZD

$3,837 USD

View

Retailer 9

$6,808 NZD

$3,837 USD

View

Price last confirmed 28 days ago

Retailer 10

$8,358 NZD

HK$36,800 HKD

View

Retailer 11

$8,506 NZD

$4,794 USD

View

Price last confirmed 30 days ago

Retailer 12

$9,030 NZD

£4,007 GBP

View

Retailer 13

$9,390 NZD

$5,292 USD

View

Retailer 14

$9,395 NZD

$5,295 USD

View

Retailer 15

$10,291 NZD

$5,800 USD

View

Retailer 16

$10,321 NZD

$5,817 USD

View

Retailer 17

$10,921 NZD

€5,862 EUR

View

Retailer 18

$12,682 NZD

$7,147 USD

View

Price last confirmed 82 days ago

B+

Retailer 19

$14,486 NZD

ZAR 131,898 ZAR

View

Retailer 20

$14,681 NZD

A$12,730 AUD

View

Price last confirmed 8 days ago

B+

Retailer 21

$17,032 NZD

$9,599 USD

View

B+

Retailer 22

$17,346 NZD

£7,698 GBP

View

B+

Retailer 23

$18,885 NZD

$10,644 USD

View

Retailer 24

$22,061 NZD

A$19,129 AUD

View

Price last confirmed 22 days ago

Retailer 25

$23,854 NZD

$13,444 USD

View

Retailer 26

$24,210 NZD

SGD 18,439 SGD

View

Retailer 27

$25,231 NZD

$14,220 USD

View

Most Expensive

With Clarity

754595249 · Oct 31

$26,519 NZD

$14,946 USD

View

27 more retailers have this diamond

Prices start from $6,570 NZDSave up to $19,948 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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4.51ct Round

$6,570 NZD