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Marquise|Lab Grown|IGI

0.30ct E SI1 Marquise Lab Grown Diamond

VG • E/SI1 • IGI LG821620948

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG821620948

Diamond specifications and retailer prices

From £215 GBP
$286 USD
As of October 28, 2026
Save £69 GBP (24%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £284 GBP at Diamond Heaven · As of October 28, 2026
View at Diamond Heaven

About this 0.3ct lab-grown marquise diamond

This 0.3ct 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 IGI LG821620948 or 821620948. Listed at 4 retailers as of October 28, 2026, with prices from £215 to £284, a £69 spread on the same certified stone. Diamond Heaven lists it at £284. 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

0.30
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle31.8°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821620948
Dimensions7.01 × 3.53 × 2.09 mm
L/W Ratio1.99
Girdle conditionFaceted
Culet sizeNone
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
7.01 mm3.53 mm0.30 ctE / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG821620948
Side View
Table 62.0%Crown 31.8°Girdle: MED-THKPavilion 40.4°Culet: NoneDepth 59.2%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 28
Current: £284 GBP|Low: £213 GBP|High: £923 GBP|Avg: £384 GBP|-11.6%
Diamond Heaven
Retailer 2
Retailer 3
Retailer 4
October 29, 2026
Retailer 4£215 GBP
Retailer 2£226 GBP
Diamond Heaven£284 GBP
Retailer 3£923 GBP

6 data points across 4 retailers

4 retailers£215 GBP to £284 GBP

B
Cheapest Retailer
-
£215 GBP
$286 USD
B
Retailer 2
-
£226 GBP
View
Most Expensive
B
Diamond Heaven
0.3SI1ELG4862E2N · Oct 28
£284 GBP
View
2 more retailers have this diamond
Prices start from £215 GBPSave up to £69 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.

B
0.30ct Marquise
£215 GBP