Round|Lab Grown|IGI

6.00ct D IF Round Lab Grown Diamond

EX • D/IF • IGI LG729550851

Shape and cutting style on the report: Round brilliant

Certificate IGI LG729550851

Diamond specifications and retailer prices

From $18,488 NZD

$10,420 USD

As of October 29, 2026

Save $46,906 NZD (72%) vs most expensive(unlock to see where)

25 retailers carry this diamond

Most expensive: $65,394 NZD at Taylor and Hart · As of October 30, 2026

View at Taylor and Hart

About this 6ct lab-grown round diamond

This 6ct lab-grown round sits in the over five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG729550851 or 729550851. Listed at 25 retailers as of October 29, 2026, with prices from $18,488 to $65,394, a $46,906 spread on the same certified stone. Taylor and Hart lists it at $65,394. 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

6.00

Carat

Colour

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle33.1°

Pavilion angle40.8°

OriginLab Grown

Grading LabIGI

CertificateIGI LG729550851

Dimensions11.80 × 11.84 × 6.98 mm

L/W Ratio1.00

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

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG729550851

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: $19,228 NZD|Low: $18,488 NZD|High: $110,683 NZD|Avg: $36,991 NZD

Retailer 1

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

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Retailer 19

Taylor and Hart

October 31, 2026

Retailer 3$18,488 NZD

Retailer 13$18,864 NZD

Retailer 1$19,228 NZD

Retailer 2$20,704 NZD

Retailer 4$21,114 NZD

Retailer 7$21,446 NZD

Retailer 12$21,579 NZD

Retailer 11$22,755 NZD

Retailer 17$25,396 NZD

Retailer 5$30,718 NZD

Retailer 18$32,454 NZD

Retailer 6$33,868 NZD

Retailer 15$39,123 NZD

Retailer 14$39,226 NZD

Retailer 19$41,499 NZD

Retailer 8$43,267 NZD

Retailer 10$48,533 NZD

Retailer 16$59,754 NZD

Taylor and Hart$65,394 NZD

Retailer 9$110,683 NZD

40 data points across 20 retailers

25 retailers$18,488 NZD to $65,394 NZD

Cheapest Retailer

$18,488 NZD

$10,420 USD

Retailer 2

$18,864 NZD

$10,632 USD

View

Retailer 3

$19,228 NZD

$10,837 USD

View

Retailer 4

$20,704 NZD

$11,669 USD

View

Final sale: no returns

Retailer 5

$21,114 NZD

$11,900 USD

View

Retailer 6

$21,446 NZD

$12,087 USD

View

Retailer 7

$21,579 NZD

$12,162 USD

View

Retailer 8

$22,755 NZD

$12,825 USD

View

Price last confirmed 13 days ago

Retailer 9

$23,738 NZD

$13,379 USD

View

Retailer 10

$24,104 NZD

$13,585 USD

View

Retailer 11

$25,396 NZD

£11,270 GBP

View

Retailer 12

$25,718 NZD

$14,495 USD

View

Price last confirmed 15 days ago

B+

Retailer 13

$30,718 NZD

£13,632 GBP

View

B+

Retailer 14

$32,454 NZD

$18,291 USD

View

B+

Retailer 15

$33,868 NZD

£15,030 GBP

View

B+

Retailer 16

$37,196 NZD

$20,964 USD

View

B+

Retailer 17

$39,123 NZD

$22,050 USD

View

B+

Retailer 18

$39,226 NZD

$22,108 USD

View

B+

Retailer 19

$41,499 NZD

ZAR 377,849 ZAR

View

B+

Retailer 20

$43,267 NZD

€23,224 EUR

View

Retailer 21

$48,533 NZD

A$42,082 AUD

View

Price last confirmed 8 days ago

Retailer 22

$59,754 NZD

$33,677 USD

View

Retailer 23

$64,123 NZD

$36,140 USD

View

Price last confirmed 17 days ago

Most Expensive

Taylor and Hart

DOPP65X · Oct 30

$65,394 NZD

$36,857 USD

View

23 more retailers have this diamond

Prices start from $18,488 NZDSave up to $46,906 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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$18,488 NZD