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Cushion|Lab Grown|IGI

1.39ct D SI1 Cushion Lab Grown Diamond

GD • D/SI1 • IGI LG683579698

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG683579698

Diamond specifications and retailer prices

From $559 SGD
£344 GBP
As of November 1, 2026
Save $2,382 SGD (81%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $2,940 SGD at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 1.39ct lab-grown cushion diamond

This 1.39ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG683579698 or 683579698. Listed at 8 retailers as of October 31, 2026, with prices from $559 to $2,940, a $2,382 spread on the same certified stone. Do Amore Diamonds lists it at $2,940. 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

1.39
Carat
D
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle37.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG683579698
Dimensions6.66 × 6.42 × 4.20 mm
L/W Ratio1.04
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
6.66 mm6.42 mm1.39 ctD / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG683579698
Side View
Table 57.0%Crown 36.3°Girdle: MED-STKPavilion 37.6°Culet: NoneDepth 65.4%

Caratlytics Score

How it works →
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: $2,940 SGD|Low: $558 SGD|High: $3,030 SGD|Avg: $1,139 SGD
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 3$559 SGD
Retailer 4$620 SGD
Retailer 8$620 SGD
Retailer 6$701 SGD
Retailer 7$752 SGD
Retailer 9$854 SGD
Retailer 5$1,151 SGD
Retailer 2$1,870 SGD
Do Amore Diamonds$2,940 SGD

34 data points across 9 retailers

8 retailers$559 SGD to $2,940 SGD

A
Cheapest Retailer
-
$559 SGD
£344 GBP
B+
Retailer 2
-
$620 SGD
$485 USD
View
A
Retailer 3
-
$620 SGD
$485 USD
View
B+
Retailer 4
-
$701 SGD
$548 USD
View
B+
Retailer 5
-
$752 SGD
$588 USD
View
Retailer 6
-
$1,151 SGD
$900 USD
View
Price last confirmed 11 days ago
B
Retailer 7
-
$1,870 SGD
£1,152 GBP
View
Most Expensive
C
Do Amore Diamonds
7-1681876 · Oct 31
$2,940 SGD
$2,300 USD
View
7 more retailers have this diamond
Prices start from $559 SGDSave up to $2,382 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
1.39ct Cushion
$559 SGD