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Cushion|Lab Grown|IGI

1.78ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG833637805

Shape and cutting style on the report: Square cushion antique cut

Certificate IGI LG833637805

Diamond specifications and retailer prices

From $1,732 SGD
$1,355 USD
As of October 31, 2026
Save $3,684 SGD (68%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $5,416 SGD at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 1.78ct lab-grown cushion diamond

This 1.78ct 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 LG833637805 or 833637805. Listed at 17 retailers as of October 31, 2026, with prices from $1,732 to $5,416, a $3,684 spread on the same certified stone. Taylor and Hart lists it at $5,416. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.78
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG833637805
Dimensions7.51 × 7.24 × 4.53 mm
L/W Ratio1.04
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
7.51 mm7.24 mm1.78 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG833637805
Side View
Table 50.0%Crown 36.3°Girdle: MED-STKPavilion 40.1°Culet: LargeDepth 62.6%

Caratlytics Score

How it works →
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: Oct 31
Current: $5,262 SGD|Low: $1,151 SGD|High: $5,416 SGD|Avg: $3,471 SGD|-1.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Taylor and Hart
November 1, 2026
Retailer 4$1,732 SGD
Retailer 9$1,760 SGD
Retailer 10$2,058 SGD
Retailer 3$2,246 SGD
Retailer 6$2,653 SGD
Retailer 7$3,242 SGD
Retailer 5$4,168 SGD
Retailer 8$4,286 SGD
Retailer 2$4,978 SGD
Retailer 1$5,262 SGD
Taylor and Hart$5,416 SGD

41 data points across 11 retailers

17 retailers$1,732 SGD to $5,416 SGD

Retailer 1
-
$1,337 SGD
$1,046 USD
Price last confirmed 39 days ago
Retailer 2
-
$1,337 SGD
$1,046 USD
View
Price last confirmed 21 days ago
Retailer 3
-
$1,530 SGD
$1,197 USD
View
Price last confirmed 39 days ago
Retailer 4
-
$1,552 SGD
$1,214 USD
View
Price last confirmed 29 days ago
Retailer 5
-
$1,552 SGD
$1,214 USD
View
Price last confirmed 20 days ago
A
Retailer 6
-
$1,732 SGD
$1,355 USD
View
A
Retailer 7
-
$1,760 SGD
$1,377 USD
View
Final sale: no returns
A
Retailer 8
-
$2,058 SGD
$1,610 USD
View
B+
Retailer 9
-
$2,246 SGD
£1,384 GBP
View
B+
Retailer 10
-
$2,653 SGD
$2,075 USD
View
Retailer 11
-
$2,908 SGD
$2,275 USD
View
Price last confirmed 25 days ago
B+
Retailer 12
-
$3,242 SGD
$2,536 USD
View
B
Retailer 13
-
$4,168 SGD
$3,260 USD
View
B
Retailer 14
-
$4,286 SGD
£2,640 GBP
View
B
Retailer 15
-
$4,978 SGD
$3,894 USD
View
B
Retailer 16
-
$5,262 SGD
£3,241 GBP
View
Most Expensive
B
Taylor and Hart
9GF9QRZ · Oct 31
$5,416 SGD
$4,237 USD
View
16 more retailers have this diamond
Prices start from $1,732 SGDSave up to $3,684 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
1.78ct Cushion
$1,732 SGD