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Cushion|Lab Grown|IGI

1.28ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG783648800

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG783648800

Diamond specifications and retailer prices

From $1,115 USD
As of October 31, 2026
Save $1,255 USD (53%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $2,370 USD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.28ct lab-grown cushion diamond

This 1.28ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG783648800 or 783648800. Listed at 4 retailers as of October 30, 2026, with prices from $1,115 to $2,370, a $1,255 spread on the same certified stone. Brilliant Earth lists it at $2,370. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
D
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle33.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG783648800
Dimensions8.12 × 5.54 × 3.47 mm
L/W Ratio1.47
Girdle conditionFaceted
Culet sizePointed
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
8.12 mm5.54 mm1.28 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG783648800
Side View
Table 60.0%Crown 36.3°Girdle: THN-STKPavilion 33.7°Culet: NoneDepth 62.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $2,370 USD|Low: $715 USD|High: $3,400 USD|Avg: $1,844 USD|-30.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 5$715 USD
Retailer 2$1,115 USD
Retailer 8$1,155 USD
Retailer 11$1,434 USD
Retailer 4$1,441 USD
Retailer 10$1,490 USD
Retailer 9$1,498 USD
Retailer 12$1,703 USD
Retailer 6$1,948 USD
Brilliant Earth$2,370 USD
Retailer 7$3,200 USD
Retailer 3$3,213 USD

16 data points across 12 retailers

4 retailers$1,115 USD to $2,370 USD

Retailer 1
-
$715 USD
Price last confirmed 19 days ago
B+
Retailer 2
-
$1,115 USD
View
Retailer 3
-
$1,948 USD
£1,534 GBP
View
Price last confirmed 20 days ago
Most Expensive
B
Brilliant Earth
21401971Y · Oct 30
$2,370 USD
View
3 more retailers have this diamond
Prices start from $1,115 USDSave up to $1,255 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.

B+
1.28ct Cushion
$1,115 USD