Heart|Lab Grown|IGI

1.91ct D FL Heart Lab Grown Diamond

EX • D/FL • IGI LG831604009

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG831604009

Diamond specifications and retailer prices

From $1,733 NZD

$975 USD

As of November 2, 2026

Save $6,585 NZD (79%) vs most expensive(unlock to see where)

21 retailers carry this diamond

Most expensive: $8,318 NZD at Brilliant Earth · As of November 2, 2026

View at Brilliant Earth

About this 1.91ct lab-grown heart diamond

This 1.91ct lab-grown heart sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG831604009 or 831604009. Listed at 21 retailers as of November 2, 2026, with prices from $1,733 to $8,318, a $6,585 spread on the same certified stone. Brilliant Earth lists it at $8,318. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.91

Carat

Colour

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle34°

Pavilion angle40°

OriginLab Grown

Grading LabIGI

CertificateIGI LG831604009

Dimensions7.60 × 8.63 × 5.02 mm

L/W Ratio1.14

Girdle conditionFaceted

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 LG831604009

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 2

Current: $8,318 NZD|Low: $1,733 NZD|High: $10,966 NZD|Avg: $4,920 NZD|-24.1%

Brilliant Earth

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 13$1,733 NZD

Retailer 7$1,941 NZD

Retailer 19$2,010 NZD

Retailer 14$2,272 NZD

Retailer 10$2,320 NZD

Retailer 3$2,405 NZD

Retailer 4$2,746 NZD

Retailer 17$2,915 NZD

Retailer 15$3,101 NZD

Retailer 6$3,151 NZD

Retailer 20$3,768 NZD

Retailer 2$3,896 NZD

Retailer 12$4,912 NZD

Retailer 5$5,979 NZD

Retailer 18$6,517 NZD

Retailer 8$6,739 NZD

Retailer 16$6,819 NZD

Retailer 11$7,002 NZD

Retailer 9$7,248 NZD

Brilliant Earth$8,318 NZD

29 data points across 20 retailers

21 retailers$1,733 NZD to $8,318 NZD

Cheapest Retailer

$1,733 NZD

$975 USD

Retailer 2

$1,941 NZD

$1,092 USD

View

Final sale: no returns

Retailer 3

$2,010 NZD

$1,131 USD

View

Retailer 4

$2,272 NZD

£1,007 GBP

View

Retailer 5

$2,320 NZD

HK$10,200 HKD

View

Retailer 6

$2,405 NZD

$1,353 USD

View

Retailer 7

$2,673 NZD

$1,504 USD

View

Price last confirmed 20 days ago

B+

Retailer 8

$2,746 NZD

$1,545 USD

View

B+

Retailer 9

$2,915 NZD

$1,640 USD

View

B+

Retailer 10

$3,101 NZD

£1,374 GBP

View

B+

Retailer 11

$3,151 NZD

$1,773 USD

View

B+

Retailer 12

$3,768 NZD

$2,120 USD

View

Retailer 13

$3,896 NZD

$2,192 USD

View

B+

Retailer 14

$4,912 NZD

ZAR 44,652 ZAR

View

Retailer 15

$5,979 NZD

$3,364 USD

View

Retailer 16

$6,517 NZD

$3,667 USD

View

Retailer 17

$6,739 NZD

SGD 5,124 SGD

View

Retailer 18

$6,819 NZD

£3,021 GBP

View

Retailer 19

$7,002 NZD

$3,940 USD

View

Retailer 20

$7,248 NZD

$4,078 USD

View

Most Expensive

Brilliant Earth

21605244A · Nov 2

$8,318 NZD

$4,680 USD

View

20 more retailers have this diamond

Prices start from $1,733 NZDSave up to $6,585 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.

Similar diamonds

1.91ct Heart

$1,733 NZD