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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 $409 AUD
£226 GBP
As of October 27, 2026
Save $2,374 AUD (85%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $2,782 AUD 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 $409 to $2,782, a $2,374 spread on the same certified stone. Brilliant Earth lists it at $2,782. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 27
Current: $2,782 AUD|Low: $284 AUD|High: $2,868 AUD|Avg: $952 AUD|-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$295 AUD
Retailer 3$330 AUD
Retailer 12$367 AUD
Retailer 7$409 AUD
Retailer 2$593 AUD
Retailer 14$634 AUD
Retailer 8$671 AUD
Retailer 5$716 AUD
Retailer 4$731 AUD
Retailer 13$946 AUD
Retailer 6$1,194 AUD
Retailer 9$1,470 AUD
Retailer 11$1,505 AUD
Brilliant Earth$2,782 AUD

39 data points across 14 retailers

16 retailers$409 AUD to $2,782 AUD

Retailer 1
-
$295 AUD
$207 USD
Price last confirmed 10 days ago
Retailer 2
-
$342 AUD
$240 USD
View
Price last confirmed 18 days ago
Retailer 3
-
$367 AUD
$257 USD
View
Price last confirmed 7 days ago
B+
Retailer 4
-
$409 AUD
£226 GBP
View
B+
Retailer 5
-
$420 AUD
HK$2,300 HKD
View
B+
Retailer 6
-
$593 AUD
€396 EUR
View
Retailer 7
-
$634 AUD
$444 USD
View
Price last confirmed 7 days ago
B+
Retailer 8
-
$671 AUD
£370 GBP
View
B+
Retailer 9
-
$716 AUD
$502 USD
View
B+
Retailer 10
-
$731 AUD
$512 USD
View
Price last confirmed 7 days ago
B
Retailer 11
-
$946 AUD
$663 USD
View
Retailer 12
-
$1,177 AUD
$825 USD
View
Price last confirmed 16 days ago
B
Retailer 13
-
$1,194 AUD
SGD 1,131 SGD
View
Retailer 14
-
$1,470 AUD
£811 GBP
View
Price last confirmed 8 days ago
B
Retailer 15
-
$1,505 AUD
$1,055 USD
View
Most Expensive
C
Brilliant Earth
20781913A · Oct 31
$2,782 AUD
$1,950 USD
View
15 more retailers have this diamond
Prices start from $409 AUDSave up to $2,374 AUD

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
$409 AUD