CaratHunter
Plans
Marquise|Lab Grown|IGI

5.05ct E SI1 Marquise Lab Grown Diamond

GD • E/SI1 • IGI LG650491267

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG650491267

Diamond specifications and retailer prices

From £596 GBP
$799 USD
As of October 31, 2026
Save £2,340 GBP (80%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £2,937 GBP at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 5.05ct lab-grown marquise diamond

This 5.05ct lab-grown marquise sits in the over five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG650491267 or 650491267. Listed at 17 retailers as of October 28, 2026, with prices from £596 to £2,937, a £2,340 spread on the same certified stone. Rare Carat lists it at £2,937. 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

5.05
Carat
E
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.1°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG650491267
Dimensions18.59 × 8.92 × 5.37 mm
L/W Ratio2.08
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
18.59 mm8.92 mm5.05 ctE / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG650491267
Side View
Table 58.0%Crown 32.1°Girdle: MED-STKPavilion 39.9°Culet: NoneDepth 60.2%

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: Oct 31
Current: £2,937 GBP|Low: £425 GBP|High: £5,694 GBP|Avg: £1,611 GBP|-9.2%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 1, 2026
Retailer 3£596 GBP
Retailer 12£618 GBP
Retailer 6£761 GBP
Retailer 13£958 GBP
Retailer 9£986 GBP
Retailer 2£991 GBP
Retailer 11£1,003 GBP
Retailer 8£1,523 GBP
Retailer 4£1,540 GBP
Retailer 5£2,017 GBP
Retailer 7£2,441 GBP
Rare Carat£2,937 GBP
Retailer 10£5,694 GBP

43 data points across 13 retailers

17 retailers£596 GBP to £2,937 GBP

Retailer 1
-
£511 GBP
$685 USD
Price last confirmed 30 days ago
Retailer 2
-
£580 GBP
$777 USD
View
Price last confirmed 33 days ago
B+
Retailer 3
-
£596 GBP
$799 USD
View
Final sale: no returns
Retailer 4
-
£610 GBP
$817 USD
View
Price last confirmed 37 days ago
Retailer 5
-
£618 GBP
$828 USD
View
Price last confirmed 29 days ago
B+
Retailer 6
-
£761 GBP
$1,020 USD
View
B+
Retailer 7
-
£958 GBP
$1,284 USD
View
B+
Retailer 8
-
£991 GBP
View
B
Retailer 9
-
£1,003 GBP
$1,344 USD
View
Retailer 10
-
£1,340 GBP
$1,796 USD
View
Price last confirmed 24 days ago
B
Retailer 11
-
£1,523 GBP
$2,040 USD
View
B
Retailer 12
-
£1,540 GBP
$2,063 USD
View
Retailer 13
-
£1,738 GBP
$2,329 USD
View
Price last confirmed 31 days ago
B
Retailer 14
-
£2,017 GBP
$2,702 USD
View
B
Retailer 15
-
£2,131 GBP
$2,855 USD
View
B
Retailer 16
-
£2,441 GBP
View
Most Expensive
B
Rare Carat
LM-0145_l_650491267 · Oct 28
£2,937 GBP
$3,935 USD
View
16 more retailers have this diamond
Prices start from £596 GBPSave up to £2,340 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+
5.05ct Marquise
£596 GBP