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Cushion|Lab Grown|IGI

1.91ct D IF Cushion Lab Grown Diamond

EX • D/IF • IGI LG628447820

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

Certificate IGI LG628447820

Diamond specifications and retailer prices

From $503 USD
As of October 30, 2026
Save $3,357 USD (87%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $3,860 USD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.91ct lab-grown cushion diamond

This 1.91ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG628447820 or 628447820. Listed at 13 retailers as of October 30, 2026, with prices from $503 to $3,860, a $3,357 spread on the same certified stone. Brilliant Earth lists it at $3,860. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.91
Carat
D
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG628447820
Dimensions7.28 × 7.28 × 7.46 mm
L/W Ratio1.00
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
7.28 mm7.28 mm1.91 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG628447820
Side View
Table 63.0%Crown 33.7°Girdle: STK-VTKPavilion 39.7°Culet: NoneDepth 64.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: $3,860 USD|Low: $487 USD|High: $4,670 USD|Avg: $2,080 USD|-17.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 30, 2026
Retailer 5$503 USD
Retailer 8$682 USD
Retailer 14$740 USD
Retailer 10$815 USD
Retailer 7$890 USD
Retailer 3$1,259 USD
Retailer 2$1,325 USD
Retailer 12$1,509 USD
Retailer 11$2,093 USD
Retailer 13$3,165 USD
Retailer 6$3,216 USD
Retailer 4$3,403 USD
Retailer 9$3,690 USD
Brilliant Earth$3,860 USD

27 data points across 14 retailers

13 retailers$503 USD to $3,860 USD

A
Cheapest Retailer
-
$503 USD
Final sale: no returns
A
Retailer 2
-
$682 USD
View
A
Retailer 3
-
$740 USD
View
A
Retailer 4
-
$815 USD
View
A
Retailer 5
-
$890 USD
€848 EUR
View
A
Retailer 6
-
$1,259 USD
View
A
Retailer 7
-
$1,325 USD
A$2,038 AUD
View
A
Retailer 8
-
$1,509 USD
View
B+
Retailer 9
-
$2,093 USD
£1,648 GBP
View
Retailer 10
-
$3,165 USD
View
Price last confirmed 9 days ago
Retailer 11
-
$3,403 USD
A$5,236 AUD
View
Price last confirmed 22 days ago
B
Retailer 12
-
$3,690 USD
View
Most Expensive
B
Brilliant Earth
18070216Y · Oct 30
$3,860 USD
View
12 more retailers have this diamond
Prices start from $503 USDSave up to $3,357 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
1.91ct Cushion
$503 USD