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Round|Lab Grown|IGI

1.51ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG806616973

Shape and cutting style on the report: Round brilliant

Certificate IGI LG806616973

Diamond specifications and retailer prices

From £299 GBP
As of November 3, 2026
Save £2,960 GBP (91%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: £3,259 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 LG806616973 or 806616973. Listed at 25 retailers as of November 3, 2026, with prices from £299 to £3,259, a £2,960 spread on the same certified stone. Brilliant Earth lists it at £3,259. 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 angle32.9°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG806616973
Dimensions7.42 × 7.46 × 4.49 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.42 mm7.46 mm1.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG806616973
Side View
Table 59.0%Crown 32.9°Girdle: MediumPavilion 41°Culet: NoneDepth 60.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 3
Current: £474 GBP|Low: £299 GBP|High: £1,650 GBP|Avg: £800 GBP|-3.9%
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November 4, 2026
Retailer 23£299 GBP
Retailer 16£335 GBP
Retailer 11£336 GBP
Retailer 3£371 GBP
Retailer 14£371 GBP
Retailer 15£417 GBP
Retailer 1£474 GBP
Retailer 22£481 GBP
Retailer 2£498 GBP
Retailer 5£550 GBP
Retailer 17£580 GBP
Retailer 12£601 GBP
Retailer 18£640 GBP
Retailer 6£734 GBP
Retailer 20£839 GBP
Retailer 21£864 GBP
Retailer 8£1,193 GBP
Retailer 10£1,201 GBP
Retailer 7£1,219 GBP
Retailer 4£1,366 GBP
Retailer 9£1,390 GBP
Retailer 19£1,450 GBP
Retailer 13£1,631 GBP

22 data points across 23 retailers

25 retailers£299 GBP to £3,259 GBP

A
Cheapest Retailer
-
£299 GBP
A
Retailer 2
-
£335 GBP
View
Final sale: no returns
A
Retailer 3
-
£336 GBP
View
A
Retailer 4
-
£371 GBP
View
Retailer 5
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£371 GBP
View
Price last confirmed 10 days ago
A
Retailer 6
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£417 GBP
View
A
Retailer 7
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£474 GBP
View
A
Retailer 8
-
£481 GBP
View
A
Retailer 9
-
£498 GBP
View
A
Retailer 10
-
£550 GBP
View
A
Retailer 11
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£580 GBP
View
A
Retailer 12
-
£601 GBP
View
A
Retailer 13
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£640 GBP
View
A
Retailer 14
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£734 GBP
View
B+
Retailer 15
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£839 GBP
View
B+
Retailer 16
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£864 GBP
View
B+
Retailer 17
-
£1,193 GBP
View
B+
Retailer 18
-
£1,201 GBP
View
B+
Retailer 19
-
£1,219 GBP
View
B+
Retailer 20
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£1,317 GBP
View
B+
Retailer 21
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£1,366 GBP
View
B
Retailer 22
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£1,390 GBP
View
B
Retailer 23
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£1,450 GBP
View
B
Retailer 24
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£1,631 GBP
View
Most Expensive
B
Brilliant Earth
20205521A · Nov 4
£3,259 GBP
$4,400 USD
View
24 more retailers have this diamond
Prices start from £299 GBPSave up to £2,960 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
£299 GBP