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Cushion|Lab Grown|IGI

1.80ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG840634358

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

Certificate IGI LG840634358

Diamond specifications and retailer prices

From $919 SGD
$719 USD
As of November 1, 2026
Save $4,258 SGD (82%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $5,178 SGD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.8ct lab-grown cushion diamond

This 1.8ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG840634358 or 840634358. Listed at 19 retailers as of October 31, 2026, with prices from $919 to $5,178, a $4,258 spread on the same certified stone. Brilliant Earth lists it at $5,178. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.80
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle38.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840634358
Dimensions6.94 × 6.87 × 4.58 mm
L/W Ratio1.01
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
6.94 mm6.87 mm1.80 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840634358
Side View
Table 62.0%Crown 36.3°Girdle: MED-THKPavilion 38.1°Culet: NoneDepth 66.7%

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: $5,178 SGD|Low: $919 SGD|High: $7,364 SGD|Avg: $2,793 SGD|-29.7%
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
Retailer 19
November 1, 2026
Retailer 7$919 SGD
Retailer 2$991 SGD
Retailer 19$1,080 SGD
Retailer 6$1,222 SGD
Retailer 8$1,439 SGD
Retailer 12$1,453 SGD
Retailer 14$1,604 SGD
Retailer 18$1,611 SGD
Retailer 3$1,897 SGD
Retailer 15$2,109 SGD
Retailer 13$2,728 SGD
Retailer 4$3,032 SGD
Retailer 16$3,193 SGD
Retailer 9$3,331 SGD
Retailer 17$4,090 SGD
Retailer 11$4,435 SGD
Retailer 10$4,468 SGD
Retailer 5$4,685 SGD
Brilliant Earth$5,178 SGD

17 data points across 19 retailers

19 retailers$919 SGD to $5,178 SGD

A
Cheapest Retailer
-
$919 SGD
$719 USD
Final sale: no returns
A
Retailer 2
-
$991 SGD
£610 GBP
View
A
Retailer 3
-
$1,080 SGD
$845 USD
View
A
Retailer 4
-
$1,222 SGD
$956 USD
View
A
Retailer 5
-
$1,439 SGD
$1,126 USD
View
A
Retailer 6
-
$1,453 SGD
£895 GBP
View
A
Retailer 7
-
$1,604 SGD
€1,195 EUR
View
A
Retailer 8
-
$1,611 SGD
ZAR 20,352 ZAR
View
A
Retailer 9
-
$1,897 SGD
$1,484 USD
View
A
Retailer 10
-
$2,109 SGD
$1,650 USD
View
B+
Retailer 11
-
$2,728 SGD
£1,680 GBP
View
B+
Retailer 12
-
$3,032 SGD
$2,372 USD
View
B+
Retailer 13
-
$3,193 SGD
$2,498 USD
View
B+
Retailer 14
-
$3,331 SGD
View
B
Retailer 15
-
$4,090 SGD
£2,519 GBP
View
B
Retailer 16
-
$4,435 SGD
$3,469 USD
View
B
Retailer 17
-
$4,468 SGD
$3,495 USD
View
B
Retailer 18
-
$4,685 SGD
$3,665 USD
View
Most Expensive
B
Brilliant Earth
22142712A · Oct 31
$5,178 SGD
$4,050 USD
View
18 more retailers have this diamond
Prices start from $919 SGDSave up to $4,258 SGD

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
1.80ct Cushion
$919 SGD