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Cushion|Lab Grown|IGI

8.51ct H VS1 Cushion Lab Grown Diamond

EX • H/VS1 • IGI LG647454568

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG647454568

Diamond specifications and retailer prices

From $4,233 NZD
$2,386 USD
As of November 1, 2026
Save $21,778 NZD (84%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $26,011 NZD at Do Amore Diamonds · As of November 1, 2026
View at Do Amore Diamonds

About this 8.51ct lab-grown cushion diamond

This 8.51ct lab-grown cushion sits in the over five carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG647454568 or 647454568. Listed at 14 retailers as of November 1, 2026, with prices from $4,233 to $26,011, a $21,778 spread on the same certified stone. Do Amore Diamonds lists it at $26,011. 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

8.51
Carat
H
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.7°
Pavilion angle36.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG647454568
Dimensions14.75 × 10.31 × 6.80 mm
L/W Ratio1.43
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
14.75 mm10.31 mm8.51 ctH / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG647454568
Side View
Table 64.0%Crown 37.7°Girdle: STK-VTKPavilion 36.8°Culet: NoneDepth 66.0%

Caratlytics Score

How it works →
A
Excellent
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: Nov 1
Current: $26,011 NZD|Low: $4,233 NZD|High: $27,715 NZD|Avg: $10,200 NZD|-6.1%
Do Amore Diamonds
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
November 1, 2026
Retailer 13$4,233 NZD
Retailer 16$4,384 NZD
Retailer 12$4,675 NZD
Retailer 3$5,115 NZD
Retailer 5$5,177 NZD
Retailer 10$5,759 NZD
Retailer 8$5,881 NZD
Retailer 15$6,157 NZD
Retailer 11$8,117 NZD
Retailer 9$8,967 NZD
Retailer 4$9,194 NZD
Retailer 14$12,290 NZD
Retailer 2$12,957 NZD
Retailer 6$16,900 NZD
Retailer 7$22,179 NZD
Do Amore Diamonds$26,011 NZD

29 data points across 16 retailers

14 retailers$4,233 NZD to $26,011 NZD

A
Cheapest Retailer
-
$4,233 NZD
$2,386 USD
Final sale: no returns
Retailer 2
-
$4,384 NZD
$2,471 USD
View
Price last confirmed 22 days ago
A
Retailer 3
-
$4,675 NZD
$2,635 USD
View
A
Retailer 4
-
$5,115 NZD
$2,883 USD
View
A
Retailer 5
-
$5,177 NZD
$2,918 USD
View
A
Retailer 6
-
$5,759 NZD
£2,556 GBP
View
A
Retailer 7
-
$6,157 NZD
$3,470 USD
View
B+
Retailer 8
-
$8,117 NZD
ZAR 73,903 ZAR
View
B+
Retailer 9
-
$8,967 NZD
A$7,775 AUD
View
B+
Retailer 10
-
$9,194 NZD
£4,080 GBP
View
B
Retailer 11
-
$12,290 NZD
$6,927 USD
View
B
Retailer 12
-
$12,957 NZD
£5,750 GBP
View
B
Retailer 13
-
$16,900 NZD
$9,525 USD
View
Most Expensive
B
Do Amore Diamonds
27-522F630BB · Nov 1
$26,011 NZD
$14,660 USD
View
13 more retailers have this diamond
Prices start from $4,233 NZDSave up to $21,778 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.

A
8.51ct Cushion
$4,233 NZD