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Cushion|Lab Grown|IGI

1.51ct H SI1 Cushion Lab Grown Diamond

GD • H/SI1 • IGI LG459193109

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG459193109

Diamond specifications and retailer prices

From $349 SGD
$273 USD
As of November 1, 2026
Save $1,359 SGD (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $14,949 SGD at Allurez · As of October 26, 2026
View at Allurez

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 H colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG459193109 or 459193109. Listed at 11 retailers as of November 1, 2026, with a 389% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
H
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle37.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG459193109
Dimensions7.08 × 6.59 × 4.27 mm
L/W Ratio1.07
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
7.08 mm6.59 mm1.51 ctH / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG459193109
Side View
Table 63.0%Crown 34.8°Girdle: MED-THKPavilion 37.8°Culet: NoneDepth 64.8%

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: $1,016 SGD|Low: $317 SGD|High: $1,752 SGD|Avg: $851 SGD|-0.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 8$349 SGD
Retailer 2$405 SGD
Retailer 5$547 SGD
Retailer 7$606 SGD
Retailer 11$614 SGD
Retailer 3$626 SGD
Retailer 6$707 SGD
Retailer 1$1,016 SGD
Retailer 10$1,313 SGD
Retailer 4$1,554 SGD
Retailer 9$1,708 SGD

19 data points across 11 retailers

11 retailers$349 SGD to $1,708 SGD

A
Cheapest Retailer
-
$349 SGD
$273 USD
Final sale: no returns
Retailer 2
-
$405 SGD
$317 USD
View
Price last confirmed 7 days ago
B
Retailer 3
-
$547 SGD
$428 USD
View
B+
Retailer 4
-
$606 SGD
$474 USD
View
Retailer 5
-
$614 SGD
$480 USD
View
Price last confirmed 7 days ago
B+
Retailer 6
-
$707 SGD
$553 USD
View
B+
Retailer 7
-
$1,016 SGD
$795 USD
View
B+
Retailer 8
-
$1,313 SGD
$1,027 USD
View
B+
Retailer 9
-
$1,554 SGD
£957 GBP
View
B+
Retailer 10
-
$1,708 SGD
$1,336 USD
View
Most Expensive
Allurez
3132972 · Oct 26
$14,949 SGD
$11,693 USD
View
Price under review
10 more retailers have this diamond
Prices start from $349 SGDSave up to $1,359 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
$349 SGD