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Cushion|Lab Grown|IGI

1.23ct D VS1 Cushion Lab Grown Diamond

EX • D/VS1 • IGI LG805666650

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG805666650

Diamond specifications and retailer prices

From $252 USD
As of November 1, 2026
Save $1,058 USD (81%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,310 USD at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 1.23ct lab-grown cushion diamond

This 1.23ct lab-grown cushion sits in the classic one-carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG805666650 or 805666650. Listed at 16 retailers as of October 28, 2026, with prices from $252 to $1,310, a $1,058 spread on the same certified stone. Brilliant Earth lists it at $1,310. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
D
Color
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle38.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG805666650
Dimensions6.41 × 6.21 × 4.02 mm
L/W Ratio1.03
Girdle conditionFaceted
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
Top View
6.41 mm6.21 mm1.23 ctD / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG805666650
Side View
Table 60.0%Crown 35.6°Girdle: STK-THKPavilion 38.7°Culet: NoneDepth 64.7%

Caratlytics Score

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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: $1,310 USD|Low: $116 USD|High: $1,310 USD|Avg: $554 USD
Brilliant Earth
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
Retailer 18
November 2, 2026
Retailer 9$116 USD
Retailer 6$242 USD
Retailer 12$252 USD
Retailer 2$323 USD
Retailer 15$402 USD
Retailer 13$417 USD
Retailer 17$422 USD
Retailer 11$441 USD
Retailer 16$477 USD
Retailer 8$563 USD
Retailer 10$586 USD
Retailer 7$592 USD
Retailer 5$720 USD
Retailer 4$751 USD
Retailer 3$830 USD
Retailer 14$1,129 USD
Retailer 18$1,177 USD
Brilliant Earth$1,310 USD

19 data points across 18 retailers

16 retailers$252 USD to $1,310 USD

Retailer 1
-
$242 USD
Price last confirmed 8 days ago
A
Retailer 2
-
$252 USD
View
Final sale: no returns
A
Retailer 3
-
$323 USD
£254 GBP
View
A
Retailer 4
-
$402 USD
€383 EUR
View
A
Retailer 5
-
$417 USD
ZAR 6,737 ZAR
View
A
Retailer 6
-
$422 USD
View
A
Retailer 7
-
$441 USD
£347 GBP
View
A
Retailer 8
-
$477 USD
View
B+
Retailer 9
-
$563 USD
View
Retailer 10
-
$592 USD
A$910 AUD
View
Price last confirmed 9 days ago
B+
Retailer 11
-
$720 USD
View
B+
Retailer 12
-
$751 USD
A$1,155 AUD
View
B+
Retailer 13
-
$830 USD
View
B
Retailer 14
-
$1,129 USD
£889 GBP
View
B
Retailer 15
-
$1,177 USD
View
Most Expensive
B
Brilliant Earth
20079125A · Oct 28
$1,310 USD
View
15 more retailers have this diamond
Prices start from $252 USDSave up to $1,058 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
1.23ct Cushion
$252 USD