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Radiant|Lab Grown|IGI

1.70ct D IF Radiant Lab Grown Diamond

GD • D/IF • IGI LG729529458

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

Certificate IGI LG729529458

Diamond specifications and retailer prices

From £621 GBP
$832 USD
As of October 30, 2026
Save £2,379 GBP (79%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,000 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 D colour (colourless) and IF clarity (flawless or internally-flawless), with a standard cut grade and certified by IGI LG729529458 or 729529458. Listed at 11 retailers as of October 30, 2026, with prices from £621 to £3,000, a £2,379 spread on the same certified stone. Brilliant Earth lists it at £3,000. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.70
Carat
D
Colour
IF
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.2°
Pavilion angle34.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG729529458
Dimensions8.44 × 5.89 × 3.88 mm
L/W Ratio1.43
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
8.44 mm5.89 mm1.70 ctD / IF
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG729529458
Side View
Table 67.0%Crown 46.2°Girdle: MediumPavilion 34.7°Culet: NoneDepth 65.9%

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: £3,000 GBP|Low: £605 GBP|High: £3,351 GBP|Avg: £1,479 GBP|-10.5%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 7£621 GBP
Retailer 10£634 GBP
Retailer 6£673 GBP
Retailer 2£770 GBP
Retailer 11£982 GBP
Retailer 8£1,494 GBP
Retailer 3£1,508 GBP
Retailer 4£1,943 GBP
Retailer 9£2,023 GBP
Retailer 5£2,355 GBP
Brilliant Earth£3,000 GBP

41 data points across 11 retailers

11 retailers£621 GBP to £3,000 GBP

A
Cheapest Retailer
-
£621 GBP
$832 USD
A
Retailer 2
-
£634 GBP
$850 USD
View
A
Retailer 3
-
£673 GBP
€859 EUR
View
B+
Retailer 4
-
£770 GBP
View
B+
Retailer 5
-
£982 GBP
$1,316 USD
View
Retailer 6
-
£1,494 GBP
A$3,080 AUD
View
Price last confirmed 29 days ago
B
Retailer 7
-
£1,508 GBP
$2,020 USD
View
B
Retailer 8
-
£1,943 GBP
View
B
Retailer 9
-
£2,023 GBP
$2,710 USD
View
Retailer 10
-
£2,355 GBP
$3,155 USD
View
Price last confirmed 11 days ago
Most Expensive
B
Brilliant Earth
16081761A · Oct 30
£3,000 GBP
$4,020 USD
View
10 more retailers have this diamond
Prices start from £621 GBPSave up to £2,379 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
£621 GBP