Radiant|Lab Grown|IGI

4.88ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG821668515

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

Certificate IGI LG821668515

Diamond specifications and retailer prices

From £6,295 GBP
$8,435 USD
As of October 30, 2026
Save £19,385 GBP (75%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £25,681 GBP at Michael Trio · As of October 31, 2026
View at Michael Trio

About this 4.88ct lab-grown radiant diamond

This 4.88ct 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 LG821668515 or 821668515. Listed at 24 retailers as of October 30, 2026, with prices from £6,295 to £25,681, a £19,385 spread on the same certified stone. Michael Trio lists it at £25,681. 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

4.88
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.9°
Pavilion angle27.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821668515
Dimensions11.61 × 8.19 × 5.44 mm
L/W Ratio1.42
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.61 mm8.19 mm4.88 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG821668515
Side View
Table 63.0%Crown 40.9°Girdle: Slightly ThickPavilion 27.4°Culet: NoneDepth 66.4%

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: £25,681 GBP|Low: £6,043 GBP|High: £25,681 GBP|Avg: £10,069 GBP
Michael Trio
Retailer 2
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October 31, 2026
Retailer 21£6,114 GBP
Retailer 5£6,295 GBP
Retailer 14£6,511 GBP
Retailer 11£6,547 GBP
Retailer 6£7,050 GBP
Retailer 3£7,239 GBP
Retailer 8£7,302 GBP
Retailer 12£7,302 GBP
Retailer 20£7,489 GBP
Retailer 16£8,122 GBP
Retailer 10£8,213 GBP
Retailer 9£8,450 GBP
Retailer 13£8,811 GBP
Retailer 15£10,464 GBP
Retailer 2£12,148 GBP
Retailer 17£12,603 GBP
Retailer 18£13,366 GBP
Retailer 4£15,192 GBP
Retailer 19£16,060 GBP
Retailer 7£17,830 GBP
Retailer 22£20,336 GBP
Michael Trio£25,681 GBP

42 data points across 22 retailers

24 retailers£6,295 GBP to £25,681 GBP

Retailer 1
-
£6,114 GBP
Price last confirmed 14 days ago
A
Retailer 2
-
£6,295 GBP
$8,435 USD
View
B+
Retailer 3
-
£6,511 GBP
$8,724 USD
View
B+
Retailer 4
-
£6,547 GBP
$8,772 USD
View
B+
Retailer 5
-
£7,050 GBP
$9,446 USD
View
Final sale: no returns
B+
Retailer 6
-
£7,239 GBP
$9,700 USD
View
B+
Retailer 7
-
£7,302 GBP
$9,784 USD
View
Retailer 8
-
£7,302 GBP
$9,784 USD
View
Price last confirmed 15 days ago
B+
Retailer 9
-
£7,489 GBP
$10,035 USD
View
B+
Retailer 10
-
£7,501 GBP
$10,051 USD
View
B+
Retailer 11
-
£8,122 GBP
$10,883 USD
View
B+
Retailer 12
-
£8,213 GBP
$11,004 USD
View
B+
Retailer 13
-
£8,450 GBP
$11,322 USD
View
B+
Retailer 14
-
£8,811 GBP
View
B
Retailer 15
-
£10,464 GBP
View
B+
Retailer 16
-
£12,148 GBP
€15,502 EUR
View
B
Retailer 17
-
£12,603 GBP
$16,887 USD
View
B+
Retailer 18
-
£13,366 GBP
View
Retailer 19
-
£15,192 GBP
A$31,317 AUD
View
Price last confirmed 22 days ago
Retailer 20
-
£16,060 GBP
A$33,106 AUD
View
Price last confirmed 8 days ago
B
Retailer 21
-
£17,830 GBP
$23,890 USD
View
B
Retailer 22
-
£20,336 GBP
$27,249 USD
View
B
Retailer 23
-
£23,287 GBP
$31,202 USD
View
Most Expensive
B
Michael Trio
1047588432 · Oct 31
£25,681 GBP
SGD 46,499 SGD
View
23 more retailers have this diamond
Prices start from £6,295 GBPSave up to £19,385 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
4.88ct Radiant
£6,295 GBP