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Cushion|Lab Grown|IGI

1.66ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG532262653

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG532262653

Diamond specifications and retailer prices

From $386 SGD
$302 USD
As of November 1, 2026
Save $1,647 SGD (81%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $2,033 SGD at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.66ct lab-grown cushion diamond

This 1.66ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG532262653 or 532262653. Listed at 14 retailers as of November 1, 2026, with prices from $386 to $2,033, a $1,647 spread on the same certified stone. Brilliant Earth lists it at $2,033. 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

1.66
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle38.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG532262653
Dimensions7.05 × 6.85 × 4.46 mm
L/W Ratio1.03
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
7.05 mm6.85 mm1.66 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG532262653
Side View
Table 65.0%Crown 35.4°Girdle: MED-THKPavilion 38.9°Culet: NoneDepth 65.1%

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: Nov 1
Current: $2,033 SGD|Low: $386 SGD|High: $2,046 SGD|Avg: $913 SGD|-0.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 3$386 SGD
Retailer 11$427 SGD
Retailer 6$476 SGD
Retailer 12$573 SGD
Retailer 9$576 SGD
Retailer 7$751 SGD
Retailer 5$760 SGD
Retailer 4$770 SGD
Retailer 2$1,093 SGD
Retailer 10$1,381 SGD
Retailer 8$1,722 SGD
Brilliant Earth$2,033 SGD

43 data points across 12 retailers

14 retailers$386 SGD to $2,033 SGD

A
Cheapest Retailer
-
$386 SGD
$302 USD
Final sale: no returns
Retailer 2
-
$427 SGD
$334 USD
View
Price last confirmed 8 days ago
A
Retailer 3
-
$476 SGD
£293 GBP
View
B+
Retailer 4
-
$573 SGD
$448 USD
View
A
Retailer 5
-
$576 SGD
$450 USD
View
A
Retailer 6
-
$751 SGD
£462 GBP
View
A
Retailer 7
-
$760 SGD
€566 EUR
View
B+
Retailer 8
-
$770 SGD
$602 USD
View
B+
Retailer 9
-
$770 SGD
$602 USD
View
B+
Retailer 10
-
$1,093 SGD
$855 USD
View
Retailer 11
-
$1,381 SGD
$1,080 USD
View
Price last confirmed 12 days ago
B
Retailer 12
-
$1,439 SGD
$1,125 USD
View
B
Retailer 13
-
$1,722 SGD
£1,060 GBP
View
Most Expensive
B
Brilliant Earth
11259540A · Nov 2
$2,033 SGD
$1,590 USD
View
13 more retailers have this diamond
Prices start from $386 SGDSave up to $1,647 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
1.66ct Cushion
$386 SGD