CaratHunter
Plans
Marquise|Lab Grown|IGI

1.03ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG630456349

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG630456349

Diamond specifications and retailer prices

From £206 GBP
$276 USD
As of October 30, 2026
Save £795 GBP (79%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £1,299 GBP at Brilliant Earth · As of October 17, 2026
View at Brilliant Earth

About this 1.03ct lab-grown marquise diamond

This 1.03ct lab-grown marquise sits in the classic one-carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG630456349 or 630456349. Listed at 21 retailers as of October 30, 2026, with a 386% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.03
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG630456349
Dimensions10.30 × 5.29 × 3.36 mm
L/W Ratio1.95
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
10.30 mm5.29 mm1.03 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG630456349
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 63.5%

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: £1,299 GBP|Low: £204 GBP|High: £1,299 GBP|Avg: £538 GBP
Brilliant Earth
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
Retailer 17
Retailer 18
Retailer 19
October 30, 2026
Retailer 2£206 GBP
Retailer 3£228 GBP
Retailer 5£258 GBP
Retailer 9£306 GBP
Retailer 14£391 GBP
Retailer 17£392 GBP
Retailer 7£400 GBP
Retailer 11£414 GBP
Retailer 12£433 GBP
Retailer 19£445 GBP
Retailer 15£555 GBP
Retailer 18£572 GBP
Retailer 10£611 GBP
Retailer 6£732 GBP
Retailer 8£771 GBP
Retailer 16£795 GBP
Retailer 13£918 GBP
Retailer 4£1,001 GBP
Brilliant Earth£1,299 GBP

41 data points across 19 retailers

21 retailers£206 GBP to £1,001 GBP

Retailer 1
-
£184 GBP
$246 USD
Price last confirmed 11 days ago
A
Retailer 2
-
£206 GBP
$276 USD
View
Final sale: no returns
Retailer 3
-
£228 GBP
$305 USD
View
Price last confirmed 13 days ago
Retailer 4
-
£228 GBP
$305 USD
View
Price last confirmed 10 days ago
Retailer 5
-
£230 GBP
$308 USD
View
Price last confirmed 15 days ago
A
Retailer 6
-
£258 GBP
HK$2,700 HKD
View
A
Retailer 7
-
£306 GBP
$410 USD
View
A
Retailer 8
-
£391 GBP
ZAR 8,468 ZAR
View
A
Retailer 9
-
£392 GBP
€500 EUR
View
A
Retailer 10
-
£400 GBP
$536 USD
View
A
Retailer 11
-
£433 GBP
View
A
Retailer 12
-
£445 GBP
$596 USD
View
B+
Retailer 13
-
£555 GBP
A$1,145 AUD
View
B+
Retailer 14
-
£572 GBP
$767 USD
View
B+
Retailer 15
-
£611 GBP
SGD 1,106 SGD
View
Retailer 16
-
£732 GBP
$981 USD
View
Price last confirmed 10 days ago
B+
Retailer 17
-
£771 GBP
$1,033 USD
View
B+
Retailer 18
-
£795 GBP
A$1,639 AUD
View
B+
Retailer 19
-
£918 GBP
View
B
Retailer 20
-
£1,001 GBP
$1,341 USD
View
Most Expensive
Brilliant Earth
14010213A · Oct 17
£1,299 GBP
$1,740 USD
View
Price last confirmed 13 days ago
20 more retailers have this diamond
Prices start from £206 GBPSave up to £795 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
1.03ct Marquise
£206 GBP