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Cushion|Lab Grown|IGI

4.51ct H VS1 Cushion Lab Grown Diamond

ID • H/VS1 • IGI LG839647911

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG839647911

Diamond specifications and retailer prices

From $1,224 AUD
HK$6,700 HKD
As of November 1, 2026
Save $3,739 AUD (75%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $4,963 AUD at With Clarity · As of November 2, 2026
View at With Clarity

About this 4.51ct lab-grown cushion diamond

This 4.51ct lab-grown cushion sits in the three to five carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG839647911 or 839647911. Listed at 17 retailers as of November 1, 2026, with prices from $1,224 to $4,963, a $3,739 spread on the same certified stone. With Clarity lists it at $4,963. 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
H
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle32.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839647911
Dimensions11.33 × 8.15 × 5.44 mm
L/W Ratio1.39
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.33 mm8.15 mm4.51 ctH / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839647911
Side View
Table 59.0%Crown 34.9°Girdle: MED-THKPavilion 32.9°Culet: NoneDepth 66.7%

Caratlytics Score

How it works →
A
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: Nov 1
Current: $2,471 AUD|Low: $1,023 AUD|High: $8,519 AUD|Avg: $2,999 AUD|+1.1%
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
Retailer 15
Retailer 16
Retailer 17
With Clarity
November 2, 2026
Retailer 4$1,023 AUD
Retailer 12$1,224 AUD
Retailer 9$1,282 AUD
Retailer 14$1,306 AUD
Retailer 10$1,627 AUD
Retailer 15$1,734 AUD
Retailer 2$2,002 AUD
Retailer 5$2,236 AUD
Retailer 7$2,334 AUD
Retailer 1$2,471 AUD
Retailer 6$3,305 AUD
Retailer 13$3,535 AUD
Retailer 17$3,537 AUD
Retailer 3$3,659 AUD
Retailer 8$4,081 AUD
Retailer 16$4,472 AUD
Retailer 11$4,509 AUD
With Clarity$4,963 AUD

23 data points across 18 retailers

17 retailers$1,224 AUD to $4,963 AUD

A
Cheapest Retailer
-
$1,224 AUD
HK$6,700 HKD
Retailer 2
-
$1,282 AUD
£708 GBP
View
Price last confirmed 16 days ago
Retailer 3
-
$1,306 AUD
$915 USD
View
Price last confirmed 5 days ago
A
Retailer 4
-
$1,627 AUD
€1,086 EUR
View
Retailer 5
-
$1,734 AUD
$1,215 USD
View
Price last confirmed 6 days ago
A
Retailer 6
-
$2,002 AUD
$1,403 USD
View
Retailer 7
-
$2,236 AUD
ZAR 25,314 ZAR
View
Price last confirmed 9 days ago
Retailer 8
-
$2,334 AUD
View
Price last confirmed 12 days ago
A
Retailer 9
-
$2,471 AUD
$1,732 USD
View
Retailer 10
-
$3,305 AUD
£1,824 GBP
View
Price last confirmed 7 days ago
B+
Retailer 11
-
$3,535 AUD
SGD 3,348 SGD
View
Retailer 12
-
$3,537 AUD
$2,479 USD
View
Price last confirmed 7 days ago
B+
Retailer 13
-
$3,659 AUD
$2,565 USD
View
Retailer 14
-
$4,081 AUD
$2,860 USD
View
Price last confirmed 14 days ago
B+
Retailer 15
-
$4,472 AUD
£2,468 GBP
View
B+
Retailer 16
-
$4,509 AUD
$3,160 USD
View
Most Expensive
B+
With Clarity
839647911 · Nov 2
$4,963 AUD
$3,478 USD
View
16 more retailers have this diamond
Prices start from $1,224 AUDSave up to $3,739 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.

A
4.51ct Cushion
$1,224 AUD