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 $858 USD
HK$6,700 HKD
As of October 31, 2026
Save $2,620 USD (75%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $3,478 USD at With Clarity · As of October 31, 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 October 31, 2026, with prices from $858 to $3,478, a $2,620 spread on the same certified stone. With Clarity lists it at $3,478. 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
Color
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: Oct 31
Current: $1,714 USD|Low: $717 USD|High: $5,970 USD|Avg: $2,112 USD
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
October 31, 2026
Retailer 4$717 USD
Retailer 12$858 USD
Retailer 9$899 USD
Retailer 14$915 USD
Retailer 11$1,149 USD
Retailer 15$1,215 USD
Retailer 2$1,403 USD
Retailer 5$1,567 USD
Retailer 7$1,635 USD
Retailer 1$1,714 USD
Retailer 6$2,316 USD
Retailer 13$2,478 USD
Retailer 17$2,479 USD
Retailer 3$2,565 USD
Retailer 8$2,860 USD
Retailer 16$3,134 USD
Retailer 10$3,160 USD
With Clarity$3,478 USD

22 data points across 18 retailers

17 retailers$858 USD to $3,478 USD

A
Cheapest Retailer
-
$858 USD
HK$6,700 HKD
Retailer 2
-
$899 USD
£708 GBP
View
Price last confirmed 14 days ago
A
Retailer 3
-
$915 USD
View
A
Retailer 4
-
$1,149 USD
€1,094 EUR
View
B+
Retailer 5
-
$1,215 USD
View
A
Retailer 6
-
$1,403 USD
View
Retailer 7
-
$1,567 USD
ZAR 25,314 ZAR
View
Price last confirmed 7 days ago
Retailer 8
-
$1,635 USD
A$2,516 AUD
View
Price last confirmed 10 days ago
A
Retailer 9
-
$1,714 USD
View
B+
Retailer 10
-
$2,316 USD
£1,824 GBP
View
B+
Retailer 11
-
$2,478 USD
SGD 3,348 SGD
View
B+
Retailer 12
-
$2,479 USD
View
B+
Retailer 13
-
$2,565 USD
View
Retailer 14
-
$2,860 USD
View
Price last confirmed 12 days ago
B+
Retailer 15
-
$3,134 USD
£2,468 GBP
View
B+
Retailer 16
-
$3,160 USD
View
Most Expensive
B+
With Clarity
839647911 · Oct 31
$3,478 USD
View
16 more retailers have this diamond
Prices start from $858 USDSave up to $2,620 USD

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
$858 USD