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Marquise|Lab Grown|IGI

1.50ct D SI1 Marquise Lab Grown Diamond

ID • D/SI1 • IGI LG567351261

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG567351261

Diamond specifications and retailer prices

From £231 GBP
$309 USD
As of November 1, 2026
Save £748 GBP (76%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £1,104 GBP at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

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 top-tier cut grade and certified by IGI LG567351261 or 567351261. Listed at 22 retailers as of November 1, 2026, with a 324% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.50
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG567351261
Dimensions11.75 × 5.92 × 3.80 mm
L/W Ratio1.98
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
11.75 mm5.92 mm1.50 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG567351261
Side View
Table 59.0%Crown 35.9°Girdle: STK-THKPavilion 40.2°Culet: NoneDepth 64.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: £978 GBP|Low: £197 GBP|High: £1,357 GBP|Avg: £569 GBP|-27.8%
Retailer 1
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
Retailer 15
November 1, 2026
Retailer 5£197 GBP
Retailer 13£231 GBP
Retailer 3£244 GBP
Retailer 15£287 GBP
Retailer 14£345 GBP
Retailer 10£347 GBP
Retailer 4£380 GBP
Retailer 9£406 GBP
Retailer 12£440 GBP
Retailer 8£467 GBP
Retailer 6£542 GBP
Retailer 11£749 GBP
Retailer 7£825 GBP
Retailer 2£978 GBP
Retailer 1£978 GBP

44 data points across 15 retailers

22 retailers£231 GBP to £978 GBP

Retailer 1
-
£197 GBP
$264 USD
Price last confirmed 24 days ago
A
Retailer 2
-
£231 GBP
$309 USD
View
Final sale: no returns
Retailer 3
-
£244 GBP
$327 USD
View
Price last confirmed 24 days ago
Retailer 4
-
£244 GBP
$327 USD
View
Price last confirmed 22 days ago
Retailer 5
-
£277 GBP
$371 USD
View
Price last confirmed 32 days ago
A
Retailer 6
-
£287 GBP
HK$3,000 HKD
View
Retailer 7
-
£321 GBP
$430 USD
View
Price last confirmed 33 days ago
Retailer 8
-
£339 GBP
$454 USD
View
Price last confirmed 33 days ago
A
Retailer 9
-
£345 GBP
$462 USD
View
A
Retailer 10
-
£347 GBP
$465 USD
View
A
Retailer 11
-
£380 GBP
$509 USD
View
A
Retailer 12
-
£406 GBP
€518 EUR
View
B+
Retailer 13
-
£440 GBP
$589 USD
View
B+
Retailer 14
-
£467 GBP
View
Retailer 15
-
£542 GBP
$726 USD
View
Price last confirmed 8 days ago
B
Retailer 16
-
£749 GBP
$1,004 USD
View
B
Retailer 17
-
£784 GBP
$1,051 USD
View
Retailer 18
-
£784 GBP
$1,051 USD
View
Price last confirmed 22 days ago
B
Retailer 19
-
£825 GBP
SGD 1,493 SGD
View
B
Retailer 20
-
£978 GBP
$1,310 USD
View
B
Retailer 21
-
£978 GBP
View
Most Expensive
NZ Jewellers
e7d27fde-2fca-499b-8653-22fec6f03616 · Sep 30
£1,104 GBP
$1,479 USD
View
Price last confirmed 32 days ago
21 more retailers have this diamond
Prices start from £231 GBPSave up to £748 GBP

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
1.50ct Marquise
£231 GBP