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Cushion|Lab Grown|IGI

1.15ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG653439405

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG653439405

Diamond specifications and retailer prices

From $308 SGD
As of November 6, 2026
Save $1,820 SGD (86%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $2,640 SGD at Do Amore Diamonds · As of November 6, 2026
View at Do Amore Diamonds

About this 1.15ct lab-grown cushion diamond

This 1.15ct lab-grown cushion sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG653439405 or 653439405. Listed at 10 retailers as of November 6, 2026, with a 592% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.15
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.1°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG653439405
Dimensions6.22 × 6.10 × 4.01 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.22 mm6.10 mm1.15 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG653439405
Side View
Table 62.0%Crown 31.1°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 65.7%

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 6
Current: $2,640 SGD|Low: $161 SGD|High: $2,640 SGD|Avg: $928 SGD
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 9$308 SGD
Retailer 7$341 SGD
Retailer 11$390 SGD
Retailer 5$427 SGD
Retailer 12$458 SGD
Retailer 8$698 SGD
Retailer 2$702 SGD
Retailer 4$742 SGD
Retailer 13$859 SGD
Retailer 3$1,365 SGD
Retailer 10$1,426 SGD
Retailer 6$1,505 SGD
Do Amore Diamonds$2,640 SGD

42 data points across 13 retailers

10 retailers$308 SGD to $2,127 SGD

A
Cheapest Retailer
-
$308 SGD
Final sale: no returns
Retailer 2
-
$341 SGD
View
Price last confirmed 22 days ago
A
Retailer 3
-
$390 SGD
View
A
Retailer 4
-
$458 SGD
View
B+
Retailer 5
-
$698 SGD
View
B+
Retailer 6
-
$702 SGD
View
B
Retailer 7
-
$1,426 SGD
View
B
Retailer 8
-
$1,505 SGD
View
B
Retailer 9
-
$2,127 SGD
View
Most Expensive
Do Amore Diamonds
27-FFC2DA70E · Nov 6
$2,640 SGD
$2,060 USD
View
Price under review
9 more retailers have this diamond
Prices start from $308 SGDSave up to $1,820 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
1.15ct Cushion
$308 SGD