Round|Lab Grown|IGI

4.51ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG660448727

Shape and cutting style on the report: Round brilliant

Certificate IGI LG660448727

Diamond specifications and retailer prices

From $4,176 AUD

£2,310 GBP

As of October 30, 2026

Save $24,752 AUD (86%) vs most expensive(unlock to see where)

29 retailers carry this diamond

Most expensive: $28,928 AUD at Do Amore Diamonds · As of October 31, 2026

View at Do Amore Diamonds

About this 4.51ct lab-grown round diamond

This 4.51ct lab-grown round 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 LG660448727 or 660448727. Listed at 29 retailers as of October 30, 2026, with prices from $4,176 to $28,928, a $24,752 spread on the same certified stone. Do Amore Diamonds lists it at $28,928. 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

4.51

Carat

Colour

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle35.7°

Pavilion angle40.7°

OriginLab Grown

Grading LabIGI

CertificateIGI LG660448727

Dimensions10.60 × 10.53 × 6.55 mm

L/W Ratio1.01

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 LG660448727

Side View

Caratlytics Score

How it works →

A+

Exceptional

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 30

Current: $28,928 AUD|Low: $4,036 AUD|High: $38,181 AUD|Avg: $11,414 AUD

Do Amore Diamonds

Retailer 2

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October 31, 2026

Retailer 14$4,176 AUD

Retailer 4$4,204 AUD

Retailer 10$4,708 AUD

Retailer 5$4,877 AUD

Retailer 8$4,877 AUD

Retailer 2$4,883 AUD

Retailer 7$4,934 AUD

Retailer 6$6,217 AUD

Retailer 20$7,007 AUD

Retailer 15$7,134 AUD

Retailer 18$7,404 AUD

Retailer 16$11,455 AUD

Retailer 19$11,600 AUD

Retailer 9$13,427 AUD

Retailer 3$13,444 AUD

Retailer 17$13,717 AUD

Retailer 11$18,448 AUD

Retailer 12$18,843 AUD

Retailer 13$20,244 AUD

Do Amore Diamonds$28,928 AUD

34 data points across 20 retailers

29 retailers$4,176 AUD to $28,928 AUD

A+

Cheapest Retailer

$4,176 AUD

£2,310 GBP

Retailer 2

$4,204 AUD

$2,953 USD

View

Retailer 3

$4,708 AUD

$3,307 USD

View

Final sale: no returns

Retailer 4

$4,877 AUD

$3,426 USD

View

Price last confirmed 18 days ago

Retailer 5

$4,877 AUD

$3,426 USD

View

Retailer 6

$4,883 AUD

$3,430 USD

View

Retailer 7

$4,934 AUD

$3,466 USD

View

Retailer 8

$5,432 AUD

$3,816 USD

View

Price last confirmed 35 days ago

Retailer 9

$5,694 AUD

$4,000 USD

View

Price last confirmed 37 days ago

Retailer 10

$6,215 AUD

$4,366 USD

View

Price last confirmed 34 days ago

Retailer 11

$6,217 AUD

$4,367 USD

View

Retailer 12

$6,378 AUD

HK$35,000 HKD

View

Retailer 13

$6,727 AUD

$4,725 USD

View

Retailer 14

$7,007 AUD

$4,922 USD

View

Retailer 15

$7,134 AUD

£3,946 GBP

View

Retailer 16

$7,404 AUD

$5,201 USD

View

Retailer 17

$8,693 AUD

$6,106 USD

View

Price last confirmed 33 days ago

Retailer 18

$9,904 AUD

$6,957 USD

View

Price last confirmed 88 days ago

B+

Retailer 19

$11,455 AUD

ZAR 129,997 ZAR

View

Retailer 20

$11,600 AUD

View

Price last confirmed 8 days ago

B+

Retailer 21

$12,301 AUD

$8,641 USD

View

B+

Retailer 22

$13,427 AUD

$9,432 USD

View

B+

Retailer 23

$13,444 AUD

$9,444 USD

View

B+

Retailer 24

$13,717 AUD

£7,587 GBP

View

Retailer 25

$15,259 AUD

£8,440 GBP

View

Price last confirmed 21 days ago

Retailer 26

$18,448 AUD

SGD 17,512 SGD

View

Retailer 27

$18,843 AUD

$13,237 USD

View

B+

Retailer 28

$20,244 AUD

$14,220 USD

View

Most Expensive

Do Amore Diamonds

27-9447D23E4 · Oct 31

$28,928 AUD

$20,320 USD

View

28 more retailers have this diamond

Prices start from $4,176 AUDSave up to $24,752 AUD

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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A+

4.51ct Round

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