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Marquise|Lab Grown|IGI

3.18ct E VVS1 Marquise Lab Grown Diamond

EX • E/VVS1 • IGI LG818696663

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG818696663

Diamond specifications and retailer prices

From £625 GBP
$837 USD
As of October 31, 2026
Save £2,107 GBP (77%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £4,183 GBP at Rare Carat · As of October 12, 2026
View at Rare Carat

About this 3.18ct lab-grown marquise diamond

This 3.18ct lab-grown marquise sits in the three to five carat band, graded E colour (colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG818696663 or 818696663. Listed at 17 retailers as of October 31, 2026, with a 337% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

3.18
Carat
E
Colour
VVS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.4°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818696663
Dimensions14.66 × 7.52 × 4.72 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
14.66 mm7.52 mm3.18 ctE / VVS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818696663
Side View
Table 60.0%Crown 38.4°Girdle: STK-THKPavilion 39.5°Culet: NoneDepth 62.8%

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: £625 GBP|Low: £625 GBP|High: £2,732 GBP|Avg: £1,504 GBP|-4.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
October 31, 2026
Retailer 1£625 GBP
Retailer 5£784 GBP
Retailer 15£933 GBP
Retailer 14£934 GBP
Retailer 10£1,031 GBP
Retailer 4£1,197 GBP
Retailer 11£1,462 GBP
Retailer 2£1,483 GBP
Retailer 7£1,513 GBP
Retailer 13£1,550 GBP
Retailer 8£2,130 GBP
Retailer 12£2,179 GBP
Retailer 3£2,249 GBP
Retailer 16£2,329 GBP
Retailer 6£2,573 GBP
Retailer 9£2,732 GBP

19 data points across 16 retailers

17 retailers£625 GBP to £2,732 GBP

A
Cheapest Retailer
-
£625 GBP
$837 USD
Final sale: no returns
A
Retailer 2
-
£784 GBP
$1,050 USD
View
A
Retailer 3
-
£933 GBP
$1,250 USD
View
A
Retailer 4
-
£934 GBP
$1,252 USD
View
A
Retailer 5
-
£1,031 GBP
View
A
Retailer 6
-
£1,197 GBP
€1,527 EUR
View
B+
Retailer 7
-
£1,462 GBP
A$3,014 AUD
View
B+
Retailer 8
-
£1,483 GBP
$1,987 USD
View
B+
Retailer 9
-
£1,513 GBP
ZAR 32,754 ZAR
View
B+
Retailer 10
-
£1,550 GBP
$2,077 USD
View
B+
Retailer 11
-
£2,130 GBP
$2,854 USD
View
B+
Retailer 12
-
£2,179 GBP
SGD 3,945 SGD
View
B+
Retailer 13
-
£2,249 GBP
$3,013 USD
View
B+
Retailer 14
-
£2,329 GBP
$3,120 USD
View
B
Retailer 15
-
£2,573 GBP
View
B
Retailer 16
-
£2,732 GBP
A$5,632 AUD
View
Most Expensive
Rare Carat
CN169-74A · Oct 7
£4,183 GBP
$5,605 USD
View
Price last confirmed 19 days ago
16 more retailers have this diamond
Prices start from £625 GBPSave up to £2,107 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
3.18ct Marquise
£625 GBP