Round|Lab Grown|IGI

1.25ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG837626274

Shape and cutting style on the report: Round brilliant

Certificate IGI LG837626274

Diamond specifications and retailer prices

From £382 GBP
$512 USD
As of November 1, 2026
Save £1,173 GBP (75%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,900 GBP at Brilliant Earth · As of October 14, 2026
View at Brilliant Earth

About this 1.25ct lab-grown round diamond

This 1.25ct lab-grown round 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 LG837626274 or 837626274. Listed at 16 retailers as of November 1, 2026, with a 308% 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 angle35.3°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG837626274
Dimensions6.87 × 6.90 × 4.28 mm
L/W Ratio1.00
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
6.87 mm6.90 mm1.25 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG837626274
Side View
Table 58.0%Crown 35.3°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.1%

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 1
Current: £672 GBP|Low: £382 GBP|High: £1,572 GBP|Avg: £901 GBP|-1.2%
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
November 2, 2026
Retailer 4£382 GBP
Retailer 13£529 GBP
Retailer 7£613 GBP
Retailer 3£646 GBP
Retailer 15£664 GBP
Retailer 1£672 GBP
Retailer 11£693 GBP
Retailer 9£730 GBP
Retailer 8£964 GBP
Retailer 12£1,032 GBP
Retailer 2£1,092 GBP
Retailer 14£1,138 GBP
Retailer 5£1,339 GBP
Retailer 6£1,384 GBP
Retailer 16£1,394 GBP
Retailer 10£1,555 GBP

19 data points across 16 retailers

16 retailers£382 GBP to £1,555 GBP

A
Cheapest Retailer
-
£382 GBP
$512 USD
Final sale: no returns
A
Retailer 2
-
£529 GBP
$710 USD
View
B+
Retailer 3
-
£613 GBP
$823 USD
View
B+
Retailer 4
-
£664 GBP
$891 USD
View
B+
Retailer 5
-
£672 GBP
View
B+
Retailer 6
-
£693 GBP
View
B+
Retailer 7
-
£730 GBP
ZAR 15,830 ZAR
View
Retailer 8
-
£964 GBP
A$1,991 AUD
View
Price last confirmed 26 days ago
B+
Retailer 9
-
£1,032 GBP
A$2,130 AUD
View
Retailer 10
-
£1,092 GBP
$1,465 USD
View
Price last confirmed 20 days ago
B
Retailer 11
-
£1,138 GBP
$1,527 USD
View
Retailer 12
-
£1,339 GBP
SGD 2,428 SGD
View
Price last confirmed 21 days ago
Retailer 13
-
£1,384 GBP
$1,858 USD
View
Price last confirmed 21 days ago
B
Retailer 14
-
£1,394 GBP
$1,871 USD
View
B
Retailer 15
-
£1,555 GBP
View
Most Expensive
Brilliant Earth
21722766A · Oct 14
£1,900 GBP
$2,550 USD
View
Price last confirmed 19 days ago
15 more retailers have this diamond
Prices start from £382 GBPSave up to £1,173 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 Round
£382 GBP