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Radiant|Lab Grown|IGI

1.70ct G IF Radiant Lab Grown Diamond

ID • G/IF • IGI LG581327872

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

Certificate IGI LG581327872

Diamond specifications and retailer prices

From £240 GBP
$322 USD
As of October 30, 2026
Save £1,655 GBP (87%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,896 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.7ct lab-grown radiant diamond

This 1.7ct lab-grown radiant sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG581327872 or 581327872. Listed at 18 retailers as of October 30, 2026, with prices from £240 to £1,896, a £1,655 spread on the same certified stone. Brilliant Earth lists it at £1,896. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.70
Carat
G
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.2°
Pavilion angle36.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG581327872
Dimensions8.12 × 5.99 × 4.08 mm
L/W Ratio1.36
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 Faint Blue
Top View
8.12 mm5.99 mm1.70 ctG / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG581327872
Side View
Table 63.0%Crown 44.2°Girdle: MediumPavilion 36.3°Culet: NoneDepth 68.1%

Caratlytics Score

How it works →
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: £1,896 GBP|Low: £231 GBP|High: £2,411 GBP|Avg: £734 GBP|-21.4%
Brilliant Earth
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
Retailer 15
October 31, 2026
Retailer 15£240 GBP
Retailer 5£269 GBP
Retailer 3£298 GBP
Retailer 14£402 GBP
Retailer 11£414 GBP
Retailer 6£496 GBP
Retailer 12£502 GBP
Retailer 10£512 GBP
Retailer 2£532 GBP
Retailer 9£694 GBP
Retailer 13£713 GBP
Retailer 7£853 GBP
Retailer 4£1,145 GBP
Retailer 8£1,200 GBP
Brilliant Earth£1,896 GBP

45 data points across 15 retailers

18 retailers£240 GBP to £1,896 GBP

A
Cheapest Retailer
-
£240 GBP
$322 USD
A
Retailer 2
-
£269 GBP
$360 USD
View
Final sale: no returns
A
Retailer 3
-
£278 GBP
$373 USD
View
A
Retailer 4
-
£298 GBP
$399 USD
View
A
Retailer 5
-
£298 GBP
$399 USD
View
A
Retailer 6
-
£402 GBP
$538 USD
View
A
Retailer 7
-
£414 GBP
$555 USD
View
A
Retailer 8
-
£496 GBP
$664 USD
View
A
Retailer 9
-
£512 GBP
ZAR 11,074 ZAR
View
A
Retailer 10
-
£532 GBP
View
A
Retailer 11
-
£694 GBP
A$1,431 AUD
View
B+
Retailer 12
-
£713 GBP
$955 USD
View
B+
Retailer 13
-
£853 GBP
$1,143 USD
View
B+
Retailer 14
-
£957 GBP
$1,282 USD
View
B+
Retailer 15
-
£991 GBP
$1,327 USD
View
B
Retailer 16
-
£1,145 GBP
$1,534 USD
View
B+
Retailer 17
-
£1,200 GBP
View
Most Expensive
B
Brilliant Earth
21312144A · Oct 30
£1,896 GBP
$2,540 USD
View
17 more retailers have this diamond
Prices start from £240 GBPSave up to £1,655 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
1.70ct Radiant
£240 GBP