Round|Lab Grown|IGI

4.51ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG754595249

Shape and cutting style on the report: Round brilliant

Certificate IGI LG754595249

Diamond specifications and retailer prices

From $5,272 AUD

$3,703 USD

As of October 29, 2026

Save $16,006 AUD (75%) vs most expensive(unlock to see where)

28 retailers carry this diamond

Most expensive: $21,277 AUD at With Clarity · As of October 31, 2026

View at With Clarity

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 LG754595249 or 754595249. Listed at 28 retailers as of October 29, 2026, with prices from $5,272 to $21,277, a $16,006 spread on the same certified stone. With Clarity lists it at $21,277. 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 angle34.1°

Pavilion angle40.8°

OriginLab Grown

Grading LabIGI

CertificateIGI LG754595249

Dimensions10.65 × 10.69 × 6.50 mm

L/W Ratio1.00

Girdle conditionFaceted

Culet sizePointed

Cert comments

HEARTS & ARROWS 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 LG754595249

Side View

Caratlytics Score

How it works →

Excellent

Excellent quality and great value

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

Price History

Last verified: Oct 29

Current: $8,762 AUD|Low: $5,171 AUD|High: $39,348 AUD|Avg: $12,802 AUD|+2.3%

Retailer 1

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

October 31, 2026

Retailer 10$5,272 AUD

Retailer 6$5,381 AUD

Retailer 8$7,245 AUD

Retailer 14$7,534 AUD

Retailer 12$7,538 AUD

Retailer 3$8,257 AUD

Retailer 1$8,762 AUD

Retailer 9$11,623 AUD

Retailer 11$11,780 AUD

Retailer 4$13,665 AUD

Retailer 13$13,918 AUD

Retailer 2$17,701 AUD

Retailer 5$19,425 AUD

Retailer 7$20,244 AUD

41 data points across 14 retailers

28 retailers$5,272 AUD to $21,277 AUD

Retailer 1

$4,708 AUD

$3,307 USD

Price last confirmed 32 days ago

Retailer 2

$5,122 AUD

$3,598 USD

View

Price last confirmed 24 days ago

Retailer 3

$5,122 AUD

$3,598 USD

View

Price last confirmed 37 days ago

Retailer 4

$5,122 AUD

$3,598 USD

View

Price last confirmed 17 days ago

Retailer 5

$5,272 AUD

$3,703 USD

View

Final sale: no returns

Retailer 6

$5,381 AUD

$3,780 USD

View

Retailer 7

$5,387 AUD

$3,784 USD

View

Price last confirmed 31 days ago

Retailer 8

$5,462 AUD

$3,837 USD

View

Retailer 9

$5,462 AUD

$3,837 USD

View

Price last confirmed 28 days ago

Retailer 10

$6,706 AUD

HK$36,800 HKD

View

Retailer 11

$6,825 AUD

$4,794 USD

View

Price last confirmed 30 days ago

Retailer 12

$7,245 AUD

£4,007 GBP

View

Retailer 13

$7,534 AUD

$5,292 USD

View

Retailer 14

$7,538 AUD

$5,295 USD

View

Retailer 15

$8,257 AUD

$5,800 USD

View

Retailer 16

$8,281 AUD

$5,817 USD

View

Retailer 17

$8,762 AUD

€5,862 EUR

View

Retailer 18

$10,175 AUD

$7,147 USD

View

Price last confirmed 82 days ago

B+

Retailer 19

$11,623 AUD

ZAR 131,898 ZAR

View

Retailer 20

$11,780 AUD

View

Price last confirmed 8 days ago

B+

Retailer 21

$13,665 AUD

$9,599 USD

View

B+

Retailer 22

$13,918 AUD

£7,698 GBP

View

B+

Retailer 23

$15,152 AUD

$10,644 USD

View

Retailer 24

$17,701 AUD

View

Price last confirmed 22 days ago

Retailer 25

$19,139 AUD

$13,444 USD

View

Retailer 26

$19,425 AUD

SGD 18,439 SGD

View

Retailer 27

$20,244 AUD

$14,220 USD

View

Most Expensive

With Clarity

754595249 · Oct 31

$21,277 AUD

$14,946 USD

View

27 more retailers have this diamond

Prices start from $5,272 AUDSave up to $16,006 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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4.51ct Round

$5,272 AUD