Oval|Lab Grown|IGI

4.00ct D IF Oval Lab Grown Diamond

ID • D/IF • IGI LG789621375

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG789621375

Diamond specifications and retailer prices

From $4,435 NZD

£1,968 GBP

As of October 30, 2026

Save $30,394 NZD (87%) vs most expensive(unlock to see where)

28 retailers carry this diamond

Most expensive: $34,830 NZD at Brilliant Earth · As of October 24, 2026

View at Brilliant Earth

About this 4ct lab-grown oval diamond

This 4ct lab-grown oval 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 LG789621375 or 789621375. Listed at 28 retailers as of October 24, 2026, with prices from $4,435 to $34,830, a $30,394 spread on the same certified stone. Brilliant Earth lists it at $34,830. 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

4.00

Carat

Colour

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle31.7°

Pavilion angle39.9°

OriginLab Grown

Grading LabIGI

CertificateIGI LG789621375

Dimensions13.42 × 8.96 × 5.38 mm

L/W Ratio1.50

Girdle conditionFaceted

Culet sizePointed

Cert comments

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 LG789621375

Side View

Caratlytics Score

How it works →

Excellent

Excellent quality and great value

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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30

Current: $34,830 NZD|Low: $4,420 NZD|High: $34,830 NZD|Avg: $11,127 NZD

Brilliant Earth

Retailer 2

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October 30, 2026

Retailer 2$4,435 NZD

Retailer 14$4,578 NZD

Retailer 5$4,643 NZD

Retailer 17$4,980 NZD

Retailer 23$5,048 NZD

Retailer 22$5,101 NZD

Retailer 15$5,309 NZD

Retailer 4$6,268 NZD

Retailer 3$6,854 NZD

Retailer 13$7,170 NZD

Retailer 12$7,298 NZD

Retailer 25$7,372 NZD

Retailer 9$8,272 NZD

Retailer 16$10,059 NZD

Retailer 11$10,364 NZD

Retailer 21$10,876 NZD

Retailer 19$11,301 NZD

Retailer 10$11,393 NZD

Retailer 7$12,842 NZD

Retailer 6$13,390 NZD

Retailer 20$14,291 NZD

Retailer 8$18,152 NZD

Retailer 18$18,519 NZD

Retailer 24$28,531 NZD

Brilliant Earth$34,830 NZD

27 data points across 25 retailers

28 retailers$4,435 NZD to $34,830 NZD

Cheapest Retailer

$4,435 NZD

£1,968 GBP

Retailer 2

$4,578 NZD

$2,580 USD

View

Price last confirmed 8 days ago

Retailer 3

$4,643 NZD

$2,617 USD

View

Final sale: no returns

Retailer 4

$4,980 NZD

$2,807 USD

View

Price last confirmed 11 days ago

Retailer 5

$5,048 NZD

$2,845 USD

View

Retailer 6

$5,101 NZD

$2,875 USD

View

Retailer 7

$5,309 NZD

$2,992 USD

View

Price last confirmed 10 days ago

Retailer 8

$5,907 NZD

$3,329 USD

View

Price last confirmed 19 days ago

Retailer 9

$6,268 NZD

HK$27,600 HKD

View

Retailer 10

$6,854 NZD

$3,863 USD

View

Retailer 11

$7,170 NZD

£3,182 GBP

View

Retailer 12

$7,298 NZD

$4,113 USD

View

Price last confirmed 10 days ago

Retailer 13

$7,372 NZD

$4,155 USD

View

Retailer 14

$8,272 NZD

$4,662 USD

View

Price last confirmed 8 days ago

B+

Retailer 15

$10,059 NZD

£4,464 GBP

View

B+

Retailer 16

$10,876 NZD

$6,130 USD

View

B+

Retailer 17

$11,301 NZD

ZAR 102,899 ZAR

View

Retailer 18

$11,393 NZD

A$9,879 AUD

View

Price last confirmed 9 days ago

B+

Retailer 19

$12,842 NZD

$7,238 USD

View

B+

Retailer 20

$13,390 NZD

$7,546 USD

View

B+

Retailer 21

$13,799 NZD

$7,777 USD

View

B+

Retailer 22

$14,291 NZD

£6,342 GBP

View

Retailer 23

$15,819 NZD

£7,020 GBP

View

Price last confirmed 22 days ago

Retailer 24

$18,152 NZD

SGD 13,825 SGD

View

Retailer 25

$18,519 NZD

$10,437 USD

View

Retailer 26

$19,500 NZD

$10,990 USD

View

Retailer 27

$28,531 NZD

$16,080 USD

View

Most Expensive

Brilliant Earth

18674023A · Oct 24

$34,830 NZD

$19,630 USD

View

27 more retailers have this diamond

Prices start from $4,435 NZDSave up to $30,394 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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