Radiant|Lab Grown|IGI

1.01ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG840632289

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

Certificate IGI LG840632289

Diamond specifications and retailer prices

From £138 GBP
$185 USD
As of October 30, 2026
Save £1,083 GBP (89%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £1,221 GBP at Helzberg Diamonds · As of October 31, 2026
View at Helzberg 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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG840632289 or 840632289. Listed at 22 retailers as of October 30, 2026, with prices from £138 to £1,221, a £1,083 spread on the same certified stone. Helzberg Diamonds lists it at £1,221. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.01
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle49.9°
Pavilion angle36.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840632289
Dimensions7.04 × 4.96 × 3.45 mm
L/W Ratio1.42
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
7.04 mm4.96 mm1.01 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840632289
Side View
Table 74.0%Crown 49.9°Girdle: MED-STKPavilion 36.5°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: Oct 30
Current: £1,221 GBP|Low: £138 GBP|High: £1,356 GBP|Avg: £487 GBP
Helzberg Diamonds
Retailer 2
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Retailer 22
November 1, 2026
Retailer 5£138 GBP
Retailer 12£155 GBP
Retailer 21£160 GBP
Retailer 7£171 GBP
Retailer 8£171 GBP
Retailer 4£177 GBP
Retailer 18£294 GBP
Retailer 13£300 GBP
Retailer 11£301 GBP
Retailer 2£310 GBP
Retailer 10£349 GBP
Retailer 3£405 GBP
Retailer 19£418 GBP
Retailer 16£436 GBP
Retailer 14£480 GBP
Retailer 6£551 GBP
Retailer 9£591 GBP
Retailer 15£595 GBP
Retailer 20£803 GBP
Retailer 22£943 GBP
Retailer 17£1,036 GBP
Helzberg Diamonds£1,221 GBP

20 data points across 22 retailers

22 retailers£138 GBP to £1,221 GBP

A
Cheapest Retailer
-
£138 GBP
$185 USD
A
Retailer 2
-
£155 GBP
$208 USD
View
Final sale: no returns
A
Retailer 3
-
£160 GBP
$215 USD
View
A
Retailer 4
-
£171 GBP
$230 USD
View
A
Retailer 5
-
£171 GBP
$230 USD
View
Retailer 6
-
£177 GBP
View
Price last confirmed 16 days ago
A
Retailer 7
-
£294 GBP
ZAR 6,378 ZAR
View
A
Retailer 8
-
£300 GBP
€384 EUR
View
A
Retailer 9
-
£301 GBP
$404 USD
View
A
Retailer 10
-
£310 GBP
View
A
Retailer 11
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£349 GBP
$469 USD
View
A
Retailer 12
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£405 GBP
$543 USD
View
A
Retailer 13
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£418 GBP
A$863 AUD
View
A
Retailer 14
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£436 GBP
$585 USD
View
B+
Retailer 15
-
£480 GBP
SGD 871 SGD
View
B+
Retailer 16
-
£551 GBP
$739 USD
View
B+
Retailer 17
-
£591 GBP
$793 USD
View
B+
Retailer 18
-
£595 GBP
$798 USD
View
B+
Retailer 19
-
£803 GBP
View
Retailer 20
-
£943 GBP
$1,265 USD
View
Price last confirmed 12 days ago
B
Retailer 21
-
£1,036 GBP
$1,390 USD
View
Most Expensive
B
Helzberg Diamonds
ZXZOKGMJIIOP · Oct 31
£1,221 GBP
$1,638 USD
View
21 more retailers have this diamond
Prices start from £138 GBPSave up to £1,083 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
£138 GBP