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Round|Lab Grown|IGI

1.51ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG770636656

Shape and cutting style on the report: Round brilliant

Certificate IGI LG770636656

Diamond specifications and retailer prices

From £287 GBP
As of November 3, 2026
Save £2,542 GBP (90%) vs most expensive(unlock to see where)
27 retailers carry this diamond
Most expensive: £2,830 GBP at Brilliant Earth · As of November 3, 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 LG770636656 or 770636656. Listed at 27 retailers as of November 3, 2026, with prices from £287 to £2,830, a £2,542 spread on the same certified stone. Brilliant Earth lists it at £2,830. 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 angle35.8°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG770636656
Dimensions7.29 × 7.36 × 4.52 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
7.29 mm7.36 mm1.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG770636656
Side View
Table 58.0%Crown 35.8°Girdle: MediumPavilion 40.5°Culet: NoneDepth 61.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 3
Current: £2,830 GBP|Low: £277 GBP|High: £2,830 GBP|Avg: £742 GBP
Brilliant Earth
Retailer 2
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November 4, 2026
Retailer 8£287 GBP
Retailer 22£321 GBP
Retailer 4£322 GBP
Retailer 3£356 GBP
Retailer 6£356 GBP
Retailer 10£388 GBP
Retailer 2£455 GBP
Retailer 18£467 GBP
Retailer 14£480 GBP
Retailer 12£537 GBP
Retailer 24£562 GBP
Retailer 19£564 GBP
Retailer 20£615 GBP
Retailer 13£638 GBP
Retailer 9£730 GBP
Retailer 23£827 GBP
Retailer 5£841 GBP
Retailer 16£1,137 GBP
Retailer 7£1,146 GBP
Retailer 11£1,173 GBP
Retailer 15£1,329 GBP
Retailer 17£1,334 GBP
Retailer 21£1,393 GBP
Brilliant Earth£2,830 GBP

26 data points across 24 retailers

27 retailers£287 GBP to £2,830 GBP

A
Cheapest Retailer
-
£287 GBP
A
Retailer 2
-
£321 GBP
View
Final sale: no returns
A
Retailer 3
-
£322 GBP
View
Retailer 4
-
£356 GBP
View
Price last confirmed 10 days ago
A
Retailer 5
-
£356 GBP
View
A
Retailer 6
-
£388 GBP
View
A
Retailer 7
-
£455 GBP
View
A
Retailer 8
-
£467 GBP
View
A
Retailer 9
-
£480 GBP
View
A
Retailer 10
-
£537 GBP
View
A
Retailer 11
-
£562 GBP
View
A
Retailer 12
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£564 GBP
View
A
Retailer 13
-
£615 GBP
View
A
Retailer 14
-
£638 GBP
View
B+
Retailer 15
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£730 GBP
View
B+
Retailer 16
-
£827 GBP
View
B+
Retailer 17
-
£841 GBP
View
Retailer 18
-
£854 GBP
View
Price last confirmed 7 days ago
B+
Retailer 19
-
£1,137 GBP
View
B+
Retailer 20
-
£1,146 GBP
View
B+
Retailer 21
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£1,173 GBP
View
B
Retailer 22
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£1,247 GBP
View
Retailer 23
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£1,281 GBP
View
Price last confirmed 34 days ago
B
Retailer 24
-
£1,329 GBP
View
B
Retailer 25
-
£1,334 GBP
View
B
Retailer 26
-
£1,393 GBP
View
Most Expensive
B
Brilliant Earth
20708800A · Nov 3
£2,830 GBP
$3,820 USD
View
26 more retailers have this diamond
Prices start from £287 GBPSave up to £2,542 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
£287 GBP