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Cushion|Lab Grown|IGI

1.28ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG790683937

Shape and cutting style on the report: Antique cushion cut

Certificate IGI LG790683937

Diamond specifications and retailer prices

From $1,187 USD
As of October 29, 2026
Save $3,637 USD (75%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $4,824 USD at Taylor and Hart · As of October 30, 2026
View at Taylor and Hart

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 LG790683937 or 790683937. Listed at 13 retailers as of October 29, 2026, with prices from $1,187 to $4,824, a $3,637 spread on the same certified stone. Taylor and Hart lists it at $4,824. 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 angle37.4°
Pavilion angle38.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG790683937
Dimensions7.82 × 5.78 × 3.53 mm
L/W Ratio1.35
Girdle conditionFaceted
Culet sizeLarge
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
7.82 mm5.78 mm1.28 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG790683937
Side View
Table 58.0%Crown 37.4°Girdle: MED-THKPavilion 38.5°Culet: LargeDepth 61.1%

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: Oct 29
Current: $1,994 USD|Low: $1,140 USD|High: $4,484 USD|Avg: $2,087 USD|-1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 9$1,187 USD
Retailer 3$1,292 USD
Retailer 2$1,377 USD
Retailer 10$1,377 USD
Retailer 8$1,436 USD
Retailer 5$1,550 USD
Retailer 6$1,970 USD
Retailer 1$1,994 USD
Retailer 12$2,581 USD
Retailer 11$2,638 USD
Retailer 4$3,322 USD
Retailer 7$4,431 USD

43 data points across 12 retailers

13 retailers$1,187 USD to $4,824 USD

A
Cheapest Retailer
-
$1,187 USD
B+
Retailer 2
-
$1,292 USD
View
Retailer 3
-
$1,377 USD
View
Price last confirmed 18 days ago
B+
Retailer 4
-
$1,377 USD
View
B+
Retailer 5
-
$1,436 USD
View
Final sale: no returns
B+
Retailer 6
-
$1,550 USD
View
B+
Retailer 7
-
$1,970 USD
View
B+
Retailer 8
-
$1,994 USD
£1,570 GBP
View
B
Retailer 9
-
$2,581 USD
View
B
Retailer 10
-
$2,638 USD
View
B
Retailer 11
-
$3,322 USD
£2,616 GBP
View
B
Retailer 12
-
$4,431 USD
£3,489 GBP
View
Most Expensive
B
Taylor and Hart
3KZQ333 · Oct 30
$4,824 USD
View
12 more retailers have this diamond
Prices start from $1,187 USDSave up to $3,637 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
1.28ct Cushion
$1,187 USD