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Marquise|Lab Grown|IGI

1.78ct G VS1 Marquise Lab Grown Diamond

VG • G/VS1 • IGI LG838632478

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG838632478

Diamond specifications and retailer prices

From £363 GBP
$486 USD
As of October 30, 2026
Save £1,391 GBP (79%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,754 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 1.78ct lab-grown marquise diamond

This 1.78ct lab-grown marquise sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG838632478 or 838632478. Listed at 7 retailers as of October 30, 2026, with prices from £363 to £1,754, a £1,391 spread on the same certified stone. Do Amore Diamonds lists it at £1,754. 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

1.78
Carat
G
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG838632478
Dimensions12.38 × 6.34 × 3.96 mm
L/W Ratio1.95
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.38 mm6.34 mm1.78 ctG / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG838632478
Side View
Table 62.0%Crown 35.2°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 62.5%

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: £1,754 GBP|Low: £363 GBP|High: £1,754 GBP|Avg: £862 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 31, 2026
Retailer 5£363 GBP
Retailer 7£381 GBP
Retailer 2£535 GBP
Retailer 4£888 GBP
Retailer 6£1,083 GBP
Retailer 3£1,207 GBP
Do Amore Diamonds£1,754 GBP

26 data points across 7 retailers

7 retailers£363 GBP to £1,754 GBP

B+
Cheapest Retailer
-
£363 GBP
$486 USD
A
Retailer 2
-
£381 GBP
$510 USD
View
A
Retailer 3
-
£535 GBP
View
B+
Retailer 4
-
£888 GBP
$1,190 USD
View
B
Retailer 5
-
£1,083 GBP
$1,451 USD
View
B
Retailer 6
-
£1,207 GBP
View
Most Expensive
B
Do Amore Diamonds
36-2007084 · Oct 31
£1,754 GBP
$2,350 USD
View
6 more retailers have this diamond
Prices start from £363 GBPSave up to £1,391 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
1.78ct Marquise
£363 GBP