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Marquise|Lab Grown|IGI

1.50ct D SI1 Marquise Lab Grown Diamond

GD • D/SI1 • IGI LG821630371

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG821630371

Diamond specifications and retailer prices

From $366 SGD
£226 GBP
As of October 27, 2026
Save $2,127 SGD (85%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $2,493 SGD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.5ct lab-grown marquise diamond

This 1.5ct lab-grown marquise sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG821630371 or 821630371. Listed at 16 retailers as of October 27, 2026, with prices from $366 to $2,493, a $2,127 spread on the same certified stone. Brilliant Earth lists it at $2,493. 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

1.50
Carat
D
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle35.2°
Pavilion angle39.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821630371
Dimensions12.16 × 6.07 × 3.55 mm
L/W Ratio2.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.16 mm6.07 mm1.50 ctD / SI1
OriginLab Grown
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG821630371
Side View
Table 69.0%Crown 35.2°Girdle: MED-STKPavilion 39.4°Culet: NoneDepth 58.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 27
Current: $2,493 SGD|Low: $254 SGD|High: $2,570 SGD|Avg: $853 SGD|-3.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 27, 2026
Retailer 10$265 SGD
Retailer 3$295 SGD
Retailer 12$329 SGD
Retailer 7$366 SGD
Retailer 2$532 SGD
Retailer 14$568 SGD
Retailer 8$601 SGD
Retailer 5$642 SGD
Retailer 4$655 SGD
Retailer 13$848 SGD
Retailer 6$1,070 SGD
Retailer 9$1,317 SGD
Retailer 11$1,349 SGD
Brilliant Earth$2,493 SGD

39 data points across 14 retailers

16 retailers$366 SGD to $2,493 SGD

Retailer 1
-
$265 SGD
$207 USD
Price last confirmed 9 days ago
Retailer 2
-
$307 SGD
$240 USD
View
Price last confirmed 18 days ago
Retailer 3
-
$329 SGD
$257 USD
View
Price last confirmed 7 days ago
B+
Retailer 4
-
$366 SGD
£226 GBP
View
B+
Retailer 5
-
$376 SGD
HK$2,300 HKD
View
B+
Retailer 6
-
$532 SGD
€396 EUR
View
Retailer 7
-
$568 SGD
$444 USD
View
Price last confirmed 7 days ago
B+
Retailer 8
-
$601 SGD
£370 GBP
View
B+
Retailer 9
-
$642 SGD
$502 USD
View
B+
Retailer 10
-
$655 SGD
$512 USD
View
B
Retailer 11
-
$848 SGD
$663 USD
View
Retailer 12
-
$1,055 SGD
$825 USD
View
Price last confirmed 16 days ago
B
Retailer 13
-
$1,070 SGD
View
Retailer 14
-
$1,317 SGD
£811 GBP
View
Price last confirmed 7 days ago
B
Retailer 15
-
$1,349 SGD
$1,055 USD
View
Most Expensive
C
Brilliant Earth
20781913A · Oct 31
$2,493 SGD
$1,950 USD
View
15 more retailers have this diamond
Prices start from $366 SGDSave up to $2,127 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.

B+
1.50ct Marquise
$366 SGD