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Marquise|Lab Grown|IGI

1.25ct D IF Marquise Lab Grown Diamond

ID • D/IF • IGI LG801689971

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG801689971

Diamond specifications and retailer prices

From £427 GBP
As of November 4, 2026
Save £966 GBP (69%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,409 GBP at Novita Diamonds · As of October 5, 2026
View at Novita Diamonds

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 LG801689971 or 801689971. Listed at 14 retailers as of November 4, 2026, with a 226% 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

1.25
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG801689971
Dimensions10.97 × 5.63 × 3.54 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
10.97 mm5.63 mm1.25 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG801689971
Side View
Table 59.0%Crown 35.6°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 62.9%

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: £1,409 GBP|Low: £427 GBP|High: £1,882 GBP|Avg: £979 GBP|+2.3%
Novita Diamonds
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
November 5, 2026
Retailer 8£427 GBP
Retailer 10£453 GBP
Retailer 5£498 GBP
Retailer 4£551 GBP
Retailer 2£571 GBP
Retailer 13£644 GBP
Retailer 11£733 GBP
Retailer 14£793 GBP
Retailer 3£1,122 GBP
Retailer 12£1,149 GBP
Retailer 7£1,250 GBP
Retailer 6£1,384 GBP
Retailer 9£1,393 GBP
Novita Diamonds£1,409 GBP

44 data points across 14 retailers

14 retailers£427 GBP to £1,393 GBP

A
Cheapest Retailer
-
£427 GBP
A
Retailer 2
-
£453 GBP
View
A
Retailer 3
-
£498 GBP
View
A
Retailer 4
-
£551 GBP
View
A
Retailer 5
-
£571 GBP
View
A
Retailer 6
-
£644 GBP
View
A
Retailer 7
-
£733 GBP
View
B+
Retailer 8
-
£793 GBP
View
Retailer 9
-
£1,122 GBP
View
Price last confirmed 8 days ago
B+
Retailer 10
-
£1,149 GBP
View
B+
Retailer 11
-
£1,250 GBP
View
B
Retailer 12
-
£1,384 GBP
View
B
Retailer 13
-
£1,393 GBP
View
Most Expensive
Novita Diamonds
cert_801689971 · Oct 5
£1,409 GBP
A$2,926 AUD
View
Price last confirmed 30 days ago
13 more retailers have this diamond
Prices start from £427 GBPSave up to £966 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
£427 GBP