Marquise|Lab Grown|IGI

1.30ct G VS1 Marquise Lab Grown Diamond

VG • G/VS1 • IGI LG801682739

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG801682739

Diamond specifications and retailer prices

From £231 GBP
As of November 4, 2026
Save £450 GBP (66%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £978 GBP at Brilliant Earth · As of October 21, 2026
View at Brilliant Earth

About this 1.3ct lab-grown marquise diamond

This 1.3ct lab-grown marquise sits in the one-and-a-quarter to one-and-a-half carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG801682739 or 801682739. Listed at 13 retailers as of November 3, 2026, with a 195% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.30
Carat
G
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle29.3°
Pavilion angle38.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG801682739
Dimensions12.19 × 5.71 × 3.18 mm
L/W Ratio2.13
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.19 mm5.71 mm1.30 ctG / VS1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG801682739
Side View
Table 65.0%Crown 29.3°Girdle: STK-VTKPavilion 38.1°Culet: NoneDepth 55.7%

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: Nov 4
Current: £681 GBP|Low: £221 GBP|High: £1,052 GBP|Avg: £467 GBP|-35.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 4, 2026
Retailer 3£231 GBP
Retailer 9£288 GBP
Retailer 6£295 GBP
Retailer 7£309 GBP
Retailer 5£373 GBP
Retailer 10£413 GBP
Retailer 2£430 GBP
Retailer 4£431 GBP
Retailer 11£592 GBP
Brilliant Earth£681 GBP
Retailer 8£804 GBP

34 data points across 11 retailers

13 retailers£231 GBP to £681 GBP

B+
Cheapest Retailer
-
£231 GBP
Retailer 2
-
£288 GBP
View
Price last confirmed 9 days ago
Retailer 3
-
£295 GBP
View
Price last confirmed 9 days ago
Retailer 4
-
£299 GBP
View
Price last confirmed 20 days ago
Retailer 5
-
£309 GBP
View
Price last confirmed 9 days ago
B+
Retailer 6
-
£373 GBP
View
Retailer 7
-
£413 GBP
View
Price last confirmed 10 days ago
B+
Retailer 8
-
£430 GBP
View
B+
Retailer 9
-
£431 GBP
View
Retailer 10
-
£592 GBP
View
Price last confirmed 9 days ago
B
Retailer 11
-
£681 GBP
View
Retailer 12
-
£804 GBP
View
Price last confirmed 10 days ago
Most Expensive
Brilliant Earth
20120883A · Oct 21
£978 GBP
$1,320 USD
View
Price last confirmed 14 days ago
12 more retailers have this diamond
Prices start from £231 GBPSave up to £450 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+
1.30ct Marquise
£231 GBP