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Radiant|Lab Grown|IGI

0.78ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG818658786

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG818658786

Diamond specifications and retailer prices

From £256 GBP
As of November 3, 2026
Save £888 GBP (78%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,143 GBP at Reve Diamonds · As of November 4, 2026
View at Reve Diamonds

About this 0.78ct lab-grown radiant diamond

This 0.78ct lab-grown radiant sits in the just-under-one-carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818658786 or 818658786. Listed at 18 retailers as of November 3, 2026, with prices from £256 to £1,143, a £888 spread on the same certified stone. Reve Diamonds lists it at £1,143. Flawless clarity in sub-one-carat stones is rarely visible to the naked eye over VS1, so you are paying a meaningful premium for grade rather than appearance.

The 4Cs

0.78
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.3°
Pavilion angle37.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818658786
Dimensions6.62 × 4.54 × 3.16 mm
L/W Ratio1.46
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
6.62 mm4.54 mm0.78 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818658786
Side View
Table 65.0%Crown 41.3°Girdle: MED-STKPavilion 37.1°Culet: NoneDepth 69.6%

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: £499 GBP|Low: £256 GBP|High: £1,149 GBP|Avg: £624 GBP|+0.8%
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
Reve Diamonds
November 4, 2026
Retailer 4£256 GBP
Retailer 2£283 GBP
Retailer 13£399 GBP
Retailer 12£404 GBP
Retailer 11£418 GBP
Retailer 8£460 GBP
Retailer 1£499 GBP
Retailer 6£514 GBP
Retailer 9£529 GBP
Retailer 3£637 GBP
Retailer 10£871 GBP
Retailer 5£946 GBP
Retailer 7£1,135 GBP
Reve Diamonds£1,143 GBP

36 data points across 14 retailers

18 retailers£256 GBP to £1,143 GBP

Retailer 1
-
£228 GBP
Price last confirmed 27 days ago
A
Retailer 2
-
£256 GBP
View
Final sale: no returns
Retailer 3
-
£280 GBP
View
Price last confirmed 40 days ago
Retailer 4
-
£283 GBP
View
Price last confirmed 23 days ago
Retailer 5
-
£283 GBP
View
Price last confirmed 32 days ago
A
Retailer 6
-
£399 GBP
View
A
Retailer 7
-
£404 GBP
View
A
Retailer 8
-
£418 GBP
View
B+
Retailer 9
-
£460 GBP
View
B+
Retailer 10
-
£499 GBP
View
B+
Retailer 11
-
£514 GBP
View
B+
Retailer 12
-
£529 GBP
View
B+
Retailer 13
-
£637 GBP
View
B
Retailer 14
-
£871 GBP
View
Retailer 15
-
£911 GBP
View
Price last confirmed 35 days ago
B
Retailer 16
-
£946 GBP
View
B
Retailer 17
-
£1,135 GBP
View
Most Expensive
B
Reve Diamonds
E065381F7 · Nov 4
£1,143 GBP
$1,533 USD
View
17 more retailers have this diamond
Prices start from £256 GBPSave up to £888 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
0.78ct Radiant
£256 GBP