Radiant|Lab Grown|IGI

2.57ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG799643658

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG799643658

Diamond specifications and retailer prices

From $2,475 NZD

$1,395 USD

As of October 31, 2026

Save $8,916 NZD (78%) vs most expensive(unlock to see where)

24 retailers carry this diamond

Most expensive: $11,391 NZD at Brilliant Earth · As of October 30, 2026

View at Brilliant Earth

About this 2.57ct lab-grown radiant diamond

This 2.57ct lab-grown radiant sits in the two to three carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG799643658 or 799643658. Listed at 24 retailers as of October 30, 2026, with prices from $2,475 to $11,391, a $8,916 spread on the same certified stone. Brilliant Earth lists it at $11,391. 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

2.57

Carat

Colour

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle45.3°

Pavilion angle36.7°

OriginLab Grown

Grading LabIGI

CertificateIGI LG799643658

Dimensions9.13 × 6.75 × 4.81 mm

L/W Ratio1.35

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 LG799643658

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: $11,391 NZD|Low: $2,143 NZD|High: $17,211 NZD|Avg: $6,154 NZD|-33.8%

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

October 31, 2026

Retailer 6$2,220 NZD

Retailer 3$2,475 NZD

Retailer 16$2,480 NZD

Retailer 8$2,645 NZD

Retailer 11$3,190 NZD

Retailer 5$3,536 NZD

Retailer 2$4,166 NZD

Retailer 4$4,503 NZD

Retailer 7$4,727 NZD

Retailer 12$5,729 NZD

Retailer 9$6,138 NZD

Retailer 13$7,223 NZD

Retailer 14$7,540 NZD

Retailer 10$7,758 NZD

Retailer 17$8,741 NZD

Retailer 15$9,482 NZD

Retailer 18$10,255 NZD

Brilliant Earth$11,391 NZD

32 data points across 18 retailers

24 retailers$2,475 NZD to $11,391 NZD

Retailer 1

$2,220 NZD

$1,251 USD

Price last confirmed 14 days ago

Retailer 2

$2,475 NZD

$1,395 USD

View

Retailer 3

$2,480 NZD

$1,398 USD

View

Final sale: no returns

Retailer 4

$2,645 NZD

$1,491 USD

View

Retailer 5

$3,190 NZD

£1,416 GBP

View

Retailer 6

$3,192 NZD

$1,799 USD

View

Price last confirmed 29 days ago

Retailer 7

$3,536 NZD

$1,993 USD

View

Retailer 8

$3,618 NZD

$2,039 USD

View

Price last confirmed 34 days ago

Retailer 9

$3,857 NZD

$2,174 USD

View

Price last confirmed 28 days ago

Retailer 10

$4,166 NZD

€2,236 EUR

View

Retailer 11

$4,503 NZD

$2,538 USD

View

B+

Retailer 12

$4,727 NZD

$2,664 USD

View

B+

Retailer 13

$5,729 NZD

ZAR 52,159 ZAR

View

B+

Retailer 14

$6,138 NZD

£2,724 GBP

View

B+

Retailer 15

$6,792 NZD

$3,828 USD

View

B+

Retailer 16

$7,223 NZD

$4,071 USD

View

Retailer 17

$7,230 NZD

$4,075 USD

View

Price last confirmed 31 days ago

B+

Retailer 18

$7,540 NZD

£3,346 GBP

View

B+

Retailer 19

$7,758 NZD

$4,372 USD

View

B+

Retailer 20

$8,741 NZD

SGD 6,657 SGD

View

Retailer 21

$9,482 NZD

$5,344 USD

View

Retailer 22

$10,255 NZD

$5,780 USD

View

Price last confirmed 10 days ago

Retailer 23

$10,575 NZD

$5,960 USD

View

Price last confirmed 61 days ago

Most Expensive

Brilliant Earth

21420878A · Oct 30

$11,391 NZD

$6,420 USD

View

23 more retailers have this diamond

Prices start from $2,475 NZDSave up to $8,916 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

2.57ct Radiant

$2,475 NZD