CaratHunter
Plans
Round|Lab Grown|IGI

1.51ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG754508720

Shape and cutting style on the report: Round brilliant

Certificate IGI LG754508720

Diamond specifications and retailer prices

From £304 GBP
As of November 4, 2026
Save £3,207 GBP (91%) vs most expensive(unlock to see where)
32 retailers carry this diamond
Most expensive: £3,511 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.51ct lab-grown round diamond

This 1.51ct lab-grown round sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG754508720 or 754508720. Listed at 32 retailers as of November 4, 2026, with prices from £304 to £3,511, a £3,207 spread on the same certified stone. Brilliant Earth lists it at £3,511. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754508720
Dimensions7.31 × 7.36 × 4.56 mm
L/W Ratio1.01
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
7.31 mm7.36 mm1.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754508720
Side View
Table 57.0%Crown 34.5°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 4
Current: £799 GBP|Low: £304 GBP|High: £2,222 GBP|Avg: £891 GBP|-0.5%
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
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
November 4, 2026
Retailer 8£304 GBP
Retailer 20£422 GBP
Retailer 2£441 GBP
Retailer 22£445 GBP
Retailer 7£485 GBP
Retailer 10£500 GBP
Retailer 17£554 GBP
Retailer 9£559 GBP
Retailer 18£590 GBP
Retailer 16£611 GBP
Retailer 11£630 GBP
Retailer 13£787 GBP
Retailer 1£799 GBP
Retailer 3£910 GBP
Retailer 4£1,173 GBP
Retailer 6£1,205 GBP
Retailer 14£1,216 GBP
Retailer 21£1,287 GBP
Retailer 15£1,301 GBP
Retailer 12£1,337 GBP
Retailer 19£1,339 GBP
Retailer 5£2,222 GBP

37 data points across 22 retailers

32 retailers£304 GBP to £3,511 GBP

Retailer 1
-
£250 GBP
Price last confirmed 25 days ago
Retailer 2
-
£264 GBP
View
Price last confirmed 37 days ago
Retailer 3
-
£290 GBP
View
Price last confirmed 29 days ago
A
Retailer 4
-
£304 GBP
View
Final sale: no returns
Retailer 5
-
£307 GBP
View
Price last confirmed 43 days ago
Retailer 6
-
£310 GBP
View
Price last confirmed 25 days ago
Retailer 7
-
£310 GBP
View
Price last confirmed 33 days ago
A
Retailer 8
-
£310 GBP
View
Retailer 9
-
£324 GBP
View
Price last confirmed 36 days ago
A
Retailer 10
-
£422 GBP
View
A
Retailer 11
-
£445 GBP
View
A
Retailer 12
-
£485 GBP
View
A
Retailer 13
-
£500 GBP
View
A
Retailer 14
-
£554 GBP
View
A
Retailer 15
-
£559 GBP
View
A
Retailer 16
-
£590 GBP
View
A
Retailer 17
-
£611 GBP
View
A
Retailer 18
-
£630 GBP
View
B+
Retailer 19
-
£787 GBP
View
B+
Retailer 20
-
£799 GBP
View
B+
Retailer 21
-
£910 GBP
View
Retailer 22
-
£1,101 GBP
View
Price last confirmed 26 days ago
Retailer 23
-
£1,165 GBP
View
Price last confirmed 35 days ago
B+
Retailer 24
-
£1,173 GBP
View
B+
Retailer 25
-
£1,205 GBP
View
B+
Retailer 26
-
£1,216 GBP
View
B+
Retailer 27
-
£1,287 GBP
View
B
Retailer 28
-
£1,301 GBP
View
B+
Retailer 29
-
£1,337 GBP
View
B+
Retailer 30
-
£1,339 GBP
View
B
Retailer 31
-
£2,222 GBP
View
Most Expensive
B
Brilliant Earth
18668765Y · Nov 4
£3,511 GBP
$4,740 USD
View
31 more retailers have this diamond
Prices start from £304 GBPSave up to £3,207 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
1.51ct Round
£304 GBP