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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 €256 EUR
£226 GBP
As of October 27, 2026
Save €1,489 EUR (85%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: €1,745 EUR 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 €256 to €1,745, a €1,489 spread on the same certified stone. Brilliant Earth lists it at €1,745. 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
Color
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: €1,745 EUR|Low: €178 EUR|High: €1,799 EUR|Avg: €597 EUR|-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€185 EUR
Retailer 3€207 EUR
Retailer 12€230 EUR
Retailer 7€256 EUR
Retailer 2€372 EUR
Retailer 14€397 EUR
Retailer 8€421 EUR
Retailer 5€449 EUR
Retailer 4€458 EUR
Retailer 13€593 EUR
Retailer 6€749 EUR
Retailer 9€922 EUR
Retailer 11€944 EUR
Brilliant Earth€1,745 EUR

40 data points across 14 retailers

16 retailers€256 EUR to €1,745 EUR

Retailer 1
-
€185 EUR
$207 USD
Price last confirmed 9 days ago
Retailer 2
-
€215 EUR
$240 USD
View
Price last confirmed 17 days ago
Retailer 3
-
€230 EUR
$257 USD
View
Price last confirmed 7 days ago
B+
Retailer 4
-
€256 EUR
£226 GBP
View
B+
Retailer 5
-
€264 EUR
HK$2,300 HKD
View
B+
Retailer 6
-
€372 EUR
View
Retailer 7
-
€397 EUR
$444 USD
View
Price last confirmed 7 days ago
B+
Retailer 8
-
€421 EUR
£370 GBP
View
B+
Retailer 9
-
€449 EUR
$502 USD
View
B+
Retailer 10
-
€458 EUR
$512 USD
View
B
Retailer 11
-
€593 EUR
$663 USD
View
Retailer 12
-
€738 EUR
$825 USD
View
Price last confirmed 16 days ago
B
Retailer 13
-
€749 EUR
SGD 1,131 SGD
View
Retailer 14
-
€922 EUR
£811 GBP
View
Price last confirmed 7 days ago
B
Retailer 15
-
€944 EUR
$1,055 USD
View
Most Expensive
C
Brilliant Earth
20781913A · Oct 31
€1,745 EUR
$1,950 USD
View
15 more retailers have this diamond
Prices start from €256 EURSave up to €1,489 EUR

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
€256 EUR