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Marquise|Lab Grown|GCAL

0.37ct E SI1 Marquise Lab Grown Diamond

VG • E/SI1 • GCAL 302820021

Shape and cutting style on the report: Marquise brilliant

Certificate GCAL 302820021

Diamond specifications and retailer prices

From £61 GBP
$82 USD
As of October 30, 2026
Save £560 GBP (90%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £621 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 0.37ct lab-grown marquise diamond

This 0.37ct lab-grown marquise sits in the sub-half-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by GCAL 302820021. Listed at 10 retailers as of October 29, 2026, with prices from £61 to £621, a £560 spread on the same certified stone. MOH London lists it at £621. 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

0.37
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryGood
FluorescenceNone
Crown angle33.6°
Pavilion angle40.3°
OriginLab Grown
Grading LabGCAL
CertificateGCAL 302820021
Dimensions8.19 × 3.67 × 2.18 mm
L/W Ratio2.23
Culet sizeNone
Top View
8.19 mm3.67 mm0.37 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryGood
FluorescenceNone
CertificateGCAL 302820021
Side View
Table 59.0%Crown 33.6°Girdle: THN-THKPavilion 40.3°Culet: NoneDepth 59.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £621 GBP|Low: £60 GBP|High: £644 GBP|Avg: £219 GBP|-2.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 29, 2026
Retailer 9£61 GBP
Retailer 6£71 GBP
Retailer 10£81 GBP
Retailer 3£89 GBP
Retailer 4£120 GBP
Retailer 12£139 GBP
Retailer 7£179 GBP
Retailer 5£216 GBP
Retailer 8£216 GBP
Retailer 11£244 GBP
Retailer 2£270 GBP
MOH London£621 GBP

22 data points across 12 retailers

10 retailers£61 GBP to £621 GBP

A
Cheapest Retailer
-
£61 GBP
$82 USD
A
Retailer 2
-
£71 GBP
$95 USD
View
A
Retailer 3
-
£81 GBP
$109 USD
View
A
Retailer 4
-
£89 GBP
$119 USD
View
B+
Retailer 5
-
£139 GBP
CA$259 CAD
View
B+
Retailer 6
-
£179 GBP
$240 USD
View
B
Retailer 7
-
£216 GBP
$290 USD
View
B
Retailer 8
-
£216 GBP
$290 USD
View
B
Retailer 9
-
£270 GBP
$362 USD
View
Most Expensive
B
MOH London
302820021 · Oct 29
£621 GBP
View
9 more retailers have this diamond
Prices start from £61 GBPSave up to £560 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
0.37ct Marquise
£61 GBP