CaratHunter
Plans
Cushion|Lab Grown|IGI

1.51ct E IF Cushion Lab Grown Diamond

VG • E/IF • IGI LG638415688

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

Certificate IGI LG638415688

Diamond specifications and retailer prices

From $841 SGD
$658 USD
As of October 31, 2026
Save $3,301 SGD (80%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $4,142 SGD at Brilliant Earth · As of October 30, 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 very-good cut grade and certified by IGI LG638415688 or 638415688. Listed at 19 retailers as of October 30, 2026, with prices from $841 to $4,142, a $3,301 spread on the same certified stone. Brilliant Earth lists it at $4,142. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
E
Colour
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG638415688
Dimensions6.67 × 6.60 × 4.47 mm
L/W Ratio1.01
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
6.67 mm6.60 mm1.51 ctE / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG638415688
Side View
Table 60.0%Crown 36.5°Girdle: MED-STKPavilion 39.7°Culet: NoneDepth 67.7%

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 31
Current: $4,142 SGD|Low: $841 SGD|High: $4,193 SGD|Avg: $2,076 SGD|-1.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 5$841 SGD
Retailer 3$932 SGD
Retailer 11$1,074 SGD
Retailer 4$1,202 SGD
Retailer 6$1,456 SGD
Retailer 2$1,554 SGD
Retailer 9$1,601 SGD
Retailer 7$2,170 SGD
Retailer 12$2,818 SGD
Retailer 10$3,119 SGD
Retailer 8$4,065 SGD
Brilliant Earth$4,142 SGD

41 data points across 12 retailers

19 retailers$841 SGD to $4,142 SGD

A
Cheapest Retailer
-
$841 SGD
$658 USD
Final sale: no returns
Retailer 2
-
$932 SGD
$729 USD
View
Price last confirmed 15 days ago
A
Retailer 3
-
$1,074 SGD
$840 USD
View
A
Retailer 4
-
$1,202 SGD
$940 USD
View
A
Retailer 5
-
$1,246 SGD
$975 USD
View
A
Retailer 6
-
$1,425 SGD
$1,115 USD
View
A
Retailer 7
-
$1,456 SGD
£897 GBP
View
A
Retailer 8
-
$1,554 SGD
€1,158 EUR
View
A
Retailer 9
-
$1,601 SGD
ZAR 20,230 ZAR
View
B+
Retailer 10
-
$2,170 SGD
A$2,611 AUD
View
B
Retailer 11
-
$2,708 SGD
£1,668 GBP
View
B
Retailer 12
-
$2,818 SGD
$2,204 USD
View
B
Retailer 13
-
$2,972 SGD
$2,325 USD
View
B
Retailer 14
-
$3,015 SGD
$2,358 USD
View
B
Retailer 15
-
$3,073 SGD
$2,404 USD
View
Retailer 16
-
$3,119 SGD
$2,440 USD
View
Price last confirmed 10 days ago
B
Retailer 17
-
$3,707 SGD
$2,900 USD
View
B
Retailer 18
-
$4,065 SGD
£2,504 GBP
View
Most Expensive
B
Brilliant Earth
12444282A · Oct 30
$4,142 SGD
$3,240 USD
View
18 more retailers have this diamond
Prices start from $841 SGDSave up to $3,301 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
$841 SGD