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Cushion|Lab Grown|IGI

1.51ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG816683635

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG816683635

Diamond specifications and retailer prices

From $505 SGD
$395 USD
As of October 30, 2026
Save $2,614 SGD (84%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $3,119 SGD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.51ct lab-grown cushion diamond

This 1.51ct lab-grown cushion sits in the one-and-a-half to two carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG816683635 or 816683635. Listed at 19 retailers as of October 30, 2026, with prices from $505 to $3,119, a $2,614 spread on the same certified stone. Brilliant Earth lists it at $3,119. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.7°
Pavilion angle33.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816683635
Dimensions8.09 × 5.81 × 3.84 mm
L/W Ratio1.39
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
8.09 mm5.81 mm1.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816683635
Side View
Table 57.0%Crown 32.7°Girdle: STK-THKPavilion 33.9°Culet: NoneDepth 66.1%

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: Oct 30
Current: $3,119 SGD|Low: $505 SGD|High: $4,449 SGD|Avg: $1,518 SGD|-29.9%
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 5$505 SGD
Retailer 6$560 SGD
Retailer 2$576 SGD
Retailer 15$754 SGD
Retailer 11$876 SGD
Retailer 8$885 SGD
Retailer 13$889 SGD
Retailer 17$961 SGD
Retailer 12$1,007 SGD
Retailer 16$1,299 SGD
Retailer 7$1,322 SGD
Retailer 9$1,851 SGD
Retailer 14$1,975 SGD
Retailer 10$1,984 SGD
Retailer 3$2,074 SGD
Retailer 19$2,150 SGD
Retailer 4$2,198 SGD
Retailer 18$2,991 SGD
Brilliant Earth$3,119 SGD

37 data points across 19 retailers

19 retailers$505 SGD to $3,119 SGD

A
Cheapest Retailer
-
$505 SGD
$395 USD
Final sale: no returns
A
Retailer 2
-
$560 SGD
$438 USD
View
A
Retailer 3
-
$576 SGD
£355 GBP
View
A
Retailer 4
-
$754 SGD
$590 USD
View
A
Retailer 5
-
$876 SGD
$685 USD
View
A
Retailer 6
-
$885 SGD
$692 USD
View
A
Retailer 7
-
$889 SGD
€662 EUR
View
A
Retailer 8
-
$961 SGD
ZAR 12,149 ZAR
View
A
Retailer 9
-
$1,007 SGD
£620 GBP
View
A
Retailer 10
-
$1,299 SGD
A$1,563 AUD
View
A
Retailer 11
-
$1,322 SGD
$1,034 USD
View
A
Retailer 12
-
$1,851 SGD
$1,448 USD
View
B+
Retailer 13
-
$1,975 SGD
$1,545 USD
View
Retailer 14
-
$1,984 SGD
A$2,387 AUD
View
Price last confirmed 24 days ago
B+
Retailer 15
-
$2,074 SGD
View
B+
Retailer 16
-
$2,150 SGD
$1,682 USD
View
B+
Retailer 17
-
$2,198 SGD
£1,354 GBP
View
Retailer 18
-
$2,991 SGD
$2,340 USD
View
Price last confirmed 10 days ago
Most Expensive
B+
Brilliant Earth
22183635A · Oct 31
$3,119 SGD
$2,440 USD
View
18 more retailers have this diamond
Prices start from $505 SGDSave up to $2,614 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
1.51ct Cushion
$505 SGD