Radiant|Lab Grown|IGI

4.89ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG731557728

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

Certificate IGI LG731557728

Diamond specifications and retailer prices

From £6,170 GBP
As of October 30, 2026
Save £19,810 GBP (76%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £25,981 GBP at Michael Trio · As of October 30, 2026
View at Michael Trio

About this 4.89ct lab-grown radiant diamond

This 4.89ct lab-grown radiant sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG731557728 or 731557728. Listed at 14 retailers as of October 30, 2026, with prices from £6,170 to £25,981, a £19,810 spread on the same certified stone. Michael Trio lists it at £25,981. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

4.89
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.8°
Pavilion angle34.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG731557728
Dimensions9.34 × 9.14 × 6.15 mm
L/W Ratio1.02
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.34 mm9.14 mm4.89 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG731557728
Side View
Table 68.0%Crown 42.8°Girdle: Slightly ThickPavilion 34.8°Culet: NoneDepth 67.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £25,981 GBP|Low: £6,149 GBP|High: £25,981 GBP|Avg: £13,299 GBP
Michael Trio
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 30, 2026
Retailer 2£6,170 GBP
Retailer 4£6,582 GBP
Retailer 3£7,130 GBP
Retailer 9£7,336 GBP
Retailer 10£7,336 GBP
Retailer 14£7,386 GBP
Retailer 5£10,589 GBP
Retailer 8£13,519 GBP
Retailer 11£13,561 GBP
Retailer 7£15,721 GBP
Retailer 13£18,914 GBP
Retailer 12£20,569 GBP
Retailer 6£23,476 GBP
Michael Trio£25,981 GBP

38 data points across 14 retailers

14 retailers£6,170 GBP to £25,981 GBP

A
Cheapest Retailer
-
£6,170 GBP
B+
Retailer 2
-
£6,582 GBP
$8,819 USD
View
B+
Retailer 3
-
£7,130 GBP
$9,554 USD
View
Final sale: no returns
B+
Retailer 4
-
£7,336 GBP
$9,830 USD
View
B+
Retailer 5
-
£7,336 GBP
$9,830 USD
View
Retailer 6
-
£7,386 GBP
$9,896 USD
View
Price last confirmed 18 days ago
B+
Retailer 7
-
£10,589 GBP
View
B+
Retailer 8
-
£13,519 GBP
View
Retailer 9
-
£13,561 GBP
€17,305 EUR
View
Price last confirmed 7 days ago
B
Retailer 10
-
£15,721 GBP
ZAR 340,289 ZAR
View
B
Retailer 11
-
£18,914 GBP
$25,343 USD
View
B
Retailer 12
-
£20,569 GBP
$27,561 USD
View
B
Retailer 13
-
£23,476 GBP
$31,455 USD
View
Most Expensive
B
Michael Trio
5003831750 · Oct 30
£25,981 GBP
SGD 47,042 SGD
View
13 more retailers have this diamond
Prices start from £6,170 GBPSave up to £19,810 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
4.89ct Radiant
£6,170 GBP