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Marquise|Lab Grown|IGI

4.00ct E IF Marquise Lab Grown Diamond

EX • E/IF • IGI LG817609491

Shape and cutting style on the report: Hexagonal modified brilliant

Certificate IGI LG817609491

Diamond specifications and retailer prices

From £4,415 GBP
$5,915 USD
As of October 31, 2026
Save £21,685 GBP (83%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £26,099 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 4ct lab-grown marquise diamond

This 4ct lab-grown marquise sits in the three to five carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG817609491 or 817609491. Listed at 9 retailers as of October 31, 2026, with prices from £4,415 to £26,099, a £21,685 spread on the same certified stone. Do Amore Diamonds lists it at £26,099. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

4.00
Carat
E
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle37.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG817609491
Dimensions16.12 × 7.66 × 4.98 mm
L/W Ratio2.10
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.12 mm7.66 mm4.00 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG817609491
Side View
Table 63.0%Crown 35.1°Girdle: MED-STKPavilion 37.8°Culet: NoneDepth 65.0%

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 31
Current: £26,099 GBP|Low: £1,832 GBP|High: £26,099 GBP|Avg: £7,015 GBP|+167.6%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 5£4,415 GBP
Retailer 8£4,580 GBP
Retailer 9£5,280 GBP
Retailer 6£7,127 GBP
Retailer 3£9,938 GBP
Retailer 4£12,114 GBP
Retailer 2£15,267 GBP
Retailer 7£17,137 GBP
Do Amore Diamonds£26,099 GBP

25 data points across 9 retailers

9 retailers£4,415 GBP to £26,099 GBP

A
Cheapest Retailer
-
£4,415 GBP
$5,915 USD
A
Retailer 2
-
£4,580 GBP
$6,137 USD
View
Final sale: no returns
A
Retailer 3
-
£7,127 GBP
$9,550 USD
View
B+
Retailer 4
-
£9,938 GBP
View
B+
Retailer 5
-
£12,114 GBP
$16,231 USD
View
B
Retailer 6
-
£15,267 GBP
View
B
Retailer 7
-
£17,137 GBP
$22,961 USD
View
B
Retailer 8
-
£24,390 GBP
$32,680 USD
View
Most Expensive
B
Do Amore Diamonds
27-15C9351EE · Oct 31
£26,099 GBP
$34,970 USD
View
8 more retailers have this diamond
Prices start from £4,415 GBPSave up to £21,685 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
4.00ct Marquise
£4,415 GBP