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Cushion|Lab Grown|IGI

1.67ct D SI1 Cushion Lab Grown Diamond

EX • D/SI1 • IGI LG508138247

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG508138247

Diamond specifications and retailer prices

From $405 SGD
$317 USD
As of October 30, 2026
Save $1,845 SGD (82%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $2,250 SGD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.67ct lab-grown cushion diamond

This 1.67ct 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 LG508138247 or 508138247. Listed at 11 retailers as of October 30, 2026, with prices from $405 to $2,250, a $1,845 spread on the same certified stone. Brilliant Earth lists it at $2,250. 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

1.67
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle32.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG508138247
Dimensions7.01 × 6.61 × 4.24 mm
L/W Ratio1.06
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
7.01 mm6.61 mm1.67 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG508138247
Side View
Table 57.0%Crown 36°Girdle: MED-THKPavilion 32.9°Culet: NoneDepth 64.1%

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: $2,250 SGD|Low: $405 SGD|High: $2,851 SGD|Avg: $1,021 SGD|-18.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 9$405 SGD
Retailer 8$449 SGD
Retailer 6$646 SGD
Retailer 5$652 SGD
Retailer 4$734 SGD
Retailer 3$784 SGD
Retailer 2$786 SGD
Retailer 11$886 SGD
Retailer 10$1,442 SGD
Retailer 7$1,802 SGD
Brilliant Earth$2,250 SGD

40 data points across 11 retailers

11 retailers$405 SGD to $2,250 SGD

A
Cheapest Retailer
-
$405 SGD
$317 USD
Final sale: no returns
Retailer 2
-
$449 SGD
$351 USD
View
Price last confirmed 16 days ago
A
Retailer 3
-
$646 SGD
$505 USD
View
A
Retailer 4
-
$652 SGD
$510 USD
View
A
Retailer 5
-
$734 SGD
€547 EUR
View
B+
Retailer 6
-
$784 SGD
$613 USD
View
A
Retailer 7
-
$786 SGD
£484 GBP
View
B+
Retailer 8
-
$886 SGD
$693 USD
View
Retailer 9
-
$1,442 SGD
View
Price last confirmed 19 days ago
B
Retailer 10
-
$1,802 SGD
£1,110 GBP
View
Most Expensive
B
Brilliant Earth
20666774A · Oct 31
$2,250 SGD
$1,760 USD
View
10 more retailers have this diamond
Prices start from $405 SGDSave up to $1,845 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
1.67ct Cushion
$405 SGD