Round|Lab Grown|IGI

2.51ct E FL Round Lab Grown Diamond

ID • E/FL • IGI LG818688390

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818688390

Diamond specifications and retailer prices

From $4,755 NZD

$2,680 USD

As of October 29, 2026

Save $14,475 NZD (75%) vs most expensive(unlock to see where)

17 retailers carry this diamond

Most expensive: $19,230 NZD at Taylor and Hart · As of October 31, 2026

View at Taylor and Hart

About this 2.51ct lab-grown round diamond

This 2.51ct lab-grown round sits in the two to three carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818688390 or 818688390. Listed at 17 retailers as of October 29, 2026, with prices from $4,755 to $19,230, a $14,475 spread on the same certified stone. Taylor and Hart lists it at $19,230. 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

2.51

Carat

Colour

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle34.3°

Pavilion angle40.9°

OriginLab Grown

Grading LabIGI

CertificateIGI LG818688390

Dimensions8.74 × 8.69 × 5.37 mm

L/W Ratio1.01

Girdle conditionFaceted

Cert comments

This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa

View IGI Report →View Loupe360 Video →

Top View

OriginLab Grown

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG818688390

Side View

Caratlytics Score

How it works →

B+

Very Good

Strong quality and value balance

Unlock full score analysis

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

Price History

Last verified: Oct 29

Current: $7,358 NZD|Low: $3,801 NZD|High: $19,230 NZD|Avg: $9,607 NZD|+1.7%

Retailer 1

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

Taylor and Hart

November 1, 2026

Retailer 7$4,755 NZD

Retailer 2$5,323 NZD

Retailer 11$5,516 NZD

Retailer 3$5,637 NZD

Retailer 1$7,358 NZD

Retailer 6$7,878 NZD

Retailer 8$8,093 NZD

Retailer 10$8,586 NZD

Retailer 9$13,856 NZD

Retailer 4$14,231 NZD

Retailer 5$14,847 NZD

Taylor and Hart$19,230 NZD

42 data points across 12 retailers

17 retailers$4,755 NZD to $19,230 NZD

B+

Cheapest Retailer

$4,755 NZD

$2,680 USD

Retailer 2

$4,755 NZD

$2,680 USD

View

Price last confirmed 37 days ago

Retailer 3

$5,174 NZD

$2,916 USD

View

Price last confirmed 39 days ago

B+

Retailer 4

$5,323 NZD

$3,000 USD

View

Final sale: no returns

Retailer 5

$5,440 NZD

$3,066 USD

View

Price last confirmed 35 days ago

Retailer 6

$5,440 NZD

$3,066 USD

View

Price last confirmed 36 days ago

Retailer 7

$5,516 NZD

$3,109 USD

View

Price last confirmed 19 days ago

B+

Retailer 8

$5,637 NZD

$3,177 USD

View

B+

Retailer 9

$7,358 NZD

£3,265 GBP

View

B+

Retailer 10

$7,582 NZD

$4,273 USD

View

B+

Retailer 11

$7,878 NZD

$4,440 USD

View

B+

Retailer 12

$8,093 NZD

$4,561 USD

View

Retailer 13

$8,586 NZD

$4,839 USD

View

Retailer 14

$13,856 NZD

$7,809 USD

View

Retailer 15

$14,231 NZD

ZAR 129,573 ZAR

View

Retailer 16

$14,847 NZD

£6,589 GBP

View

Most Expensive

Taylor and Hart

RD6C9YJ · Oct 31

$19,230 NZD

$10,838 USD

View

16 more retailers have this diamond

Prices start from $4,755 NZDSave up to $14,475 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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B+

2.51ct Round

$4,755 NZD