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Radiant|Lab Grown|IGI

1.01ct D SI1 Radiant Lab Grown Diamond

ID • D/SI1 • IGI LG778628708

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

Certificate IGI LG778628708

Diamond specifications and retailer prices

From £116 GBP
$156 USD
As of October 30, 2026
Save £670 GBP (85%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £786 GBP at Reve Diamonds · As of October 30, 2026
View at Reve Diamonds

About this 1.01ct lab-grown radiant diamond

This 1.01ct lab-grown radiant sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG778628708 or 778628708. Listed at 21 retailers as of October 30, 2026, with prices from £116 to £786, a £670 spread on the same certified stone. Reve Diamonds lists it at £786. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.01
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle27.3°
Pavilion angle37.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778628708
Dimensions6.24 × 4.97 × 3.55 mm
L/W Ratio1.26
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
6.24 mm4.97 mm1.01 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778628708
Side View
Table 69.0%Crown 27.3°Girdle: STK-THKPavilion 37.1°Culet: NoneDepth 71.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: £251 GBP|Low: £73 GBP|High: £683 GBP|Avg: £261 GBP|+0.6%
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
October 31, 2026
Retailer 5£73 GBP
Retailer 13£116 GBP
Retailer 3£130 GBP
Retailer 11£145 GBP
Retailer 14£145 GBP
Retailer 4£196 GBP
Retailer 6£241 GBP
Retailer 1£251 GBP
Retailer 7£251 GBP
Retailer 10£274 GBP
Retailer 2£326 GBP
Retailer 12£372 GBP
Retailer 9£485 GBP
Retailer 8£680 GBP

42 data points across 14 retailers

21 retailers£116 GBP to £786 GBP

A
Cheapest Retailer
-
£116 GBP
$156 USD
Retailer 2
-
£116 GBP
$156 USD
View
Price last confirmed 23 days ago
Retailer 3
-
£116 GBP
$156 USD
View
Price last confirmed 14 days ago
Retailer 4
-
£116 GBP
$156 USD
View
Price last confirmed 9 days ago
A
Retailer 5
-
£130 GBP
$174 USD
View
Final sale: no returns
A
Retailer 6
-
£135 GBP
$181 USD
View
Price last confirmed 7 days ago
Retailer 7
-
£143 GBP
$191 USD
View
Price last confirmed 36 days ago
A
Retailer 8
-
£145 GBP
$194 USD
View
Retailer 9
-
£145 GBP
$194 USD
View
Price last confirmed 28 days ago
B+
Retailer 10
-
£196 GBP
$262 USD
View
A
Retailer 11
-
£241 GBP
$323 USD
View
A
Retailer 12
-
£251 GBP
€320 EUR
View
A
Retailer 13
-
£251 GBP
View
A
Retailer 14
-
£274 GBP
View
B+
Retailer 15
-
£326 GBP
$437 USD
View
B+
Retailer 16
-
£372 GBP
$499 USD
View
Retailer 17
-
£464 GBP
$622 USD
View
Price last confirmed 31 days ago
B
Retailer 18
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£485 GBP
$650 USD
View
B
Retailer 19
-
£506 GBP
$677 USD
View
B
Retailer 20
-
£680 GBP
View
Most Expensive
B
Reve Diamonds
8613479D5 · Oct 30
£786 GBP
$1,054 USD
View
20 more retailers have this diamond
Prices start from £116 GBPSave up to £670 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
1.01ct Radiant
£116 GBP