CaratHunter
Plans
Marquise|Lab Grown|IGI

1.25ct D IF Marquise Lab Grown Diamond

ID • D/IF • IGI LG800680076

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG800680076

Diamond specifications and retailer prices

From £370 GBP
As of November 4, 2026
Save £1,186 GBP (76%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,556 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.25ct lab-grown marquise diamond

This 1.25ct lab-grown marquise sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG800680076 or 800680076. Listed at 15 retailers as of November 4, 2026, with prices from £370 to £1,556, a £1,186 spread on the same certified stone. Brilliant Earth lists it at £1,556. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.25
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG800680076
Dimensions11.06 × 5.66 × 3.53 mm
L/W Ratio1.95
Girdle conditionFaceted
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
11.06 mm5.66 mm1.25 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG800680076
Side View
Table 60.0%Crown 37°Girdle: MediumPavilion 39.5°Culet: NoneDepth 62.4%

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: Nov 4
Current: £1,556 GBP|Low: £370 GBP|High: £2,037 GBP|Avg: £991 GBP|-23.6%
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
November 5, 2026
Retailer 9£370 GBP
Retailer 10£453 GBP
Retailer 2£571 GBP
Retailer 5£587 GBP
Retailer 3£646 GBP
Retailer 6£656 GBP
Retailer 14£722 GBP
Retailer 12£733 GBP
Retailer 7£788 GBP
Retailer 13£1,062 GBP
Retailer 4£1,137 GBP
Retailer 11£1,230 GBP
Retailer 8£1,250 GBP
Retailer 15£1,377 GBP
Brilliant Earth£1,556 GBP

41 data points across 15 retailers

15 retailers£370 GBP to £1,556 GBP

A
Cheapest Retailer
-
£370 GBP
A
Retailer 2
-
£453 GBP
View
A
Retailer 3
-
£571 GBP
View
A
Retailer 4
-
£587 GBP
View
A
Retailer 5
-
£646 GBP
View
A
Retailer 6
-
£656 GBP
View
A
Retailer 7
-
£722 GBP
View
A
Retailer 8
-
£733 GBP
View
B+
Retailer 9
-
£788 GBP
View
B+
Retailer 10
-
£1,062 GBP
View
Retailer 11
-
£1,137 GBP
View
Price last confirmed 8 days ago
B+
Retailer 12
-
£1,230 GBP
View
B+
Retailer 13
-
£1,250 GBP
View
B
Retailer 14
-
£1,377 GBP
View
Most Expensive
B
Brilliant Earth
21143371A · Nov 4
£1,556 GBP
$2,100 USD
View
14 more retailers have this diamond
Prices start from £370 GBPSave up to £1,186 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
1.25ct Marquise
£370 GBP