Radiant|Lab Grown|IGI

3.18ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG732516320

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

Certificate IGI LG732516320

Diamond specifications and retailer prices

From £743 GBP
$996 USD
As of October 30, 2026
Save £5,854 GBP (89%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £6,598 GBP at Do Amore Diamonds · As of October 30, 2026
View at Do Amore Diamonds

About this 3.18ct lab-grown radiant diamond

This 3.18ct 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 LG732516320 or 732516320. Listed at 18 retailers as of October 30, 2026, with prices from £743 to £6,598, a £5,854 spread on the same certified stone. Do Amore Diamonds lists it at £6,598. 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

3.18
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.1°
Pavilion angle33.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG732516320
Dimensions10.24 × 7.30 × 4.82 mm
L/W Ratio1.40
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
10.24 mm7.30 mm3.18 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG732516320
Side View
Table 65.0%Crown 45.1°Girdle: STK-THKPavilion 33.6°Culet: NoneDepth 66.0%

Caratlytics Score

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A+
Exceptional
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: £6,598 GBP|Low: £743 GBP|High: £7,971 GBP|Avg: £2,837 GBP|-17.2%
Do Amore Diamonds
Retailer 2
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Retailer 12
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Retailer 17
October 30, 2026
Retailer 2£743 GBP
Retailer 17£825 GBP
Retailer 6£993 GBP
Retailer 15£1,014 GBP
Retailer 9£1,043 GBP
Retailer 14£1,405 GBP
Retailer 3£1,581 GBP
Retailer 13£1,784 GBP
Retailer 10£1,823 GBP
Retailer 16£1,838 GBP
Retailer 4£2,237 GBP
Retailer 12£2,460 GBP
Retailer 11£3,244 GBP
Retailer 5£4,112 GBP
Retailer 7£5,288 GBP
Retailer 8£6,441 GBP
Do Amore Diamonds£6,598 GBP

33 data points across 17 retailers

18 retailers£743 GBP to £6,598 GBP

A+
Cheapest Retailer
-
£743 GBP
$996 USD
A
Retailer 2
-
£825 GBP
$1,106 USD
View
A
Retailer 3
-
£993 GBP
$1,330 USD
View
A
Retailer 4
-
£1,014 GBP
$1,358 USD
View
A
Retailer 5
-
£1,043 GBP
$1,398 USD
View
Final sale: no returns
A
Retailer 6
-
£1,405 GBP
$1,882 USD
View
A
Retailer 7
-
£1,581 GBP
€2,018 EUR
View
Price last confirmed 7 days ago
A
Retailer 8
-
£1,784 GBP
$2,390 USD
View
A
Retailer 9
-
£1,823 GBP
$2,442 USD
View
A
Retailer 10
-
£1,838 GBP
$2,463 USD
View
Retailer 11
-
£2,237 GBP
A$4,611 AUD
View
Price last confirmed 8 days ago
A
Retailer 12
-
£2,460 GBP
$3,296 USD
View
B+
Retailer 13
-
£3,244 GBP
View
Retailer 14
-
£4,112 GBP
$5,510 USD
View
Price last confirmed 11 days ago
Retailer 15
-
£5,288 GBP
A$10,901 AUD
View
Price last confirmed 21 days ago
Retailer 16
-
£5,408 GBP
$7,247 USD
View
B
Retailer 17
-
£6,441 GBP
$8,630 USD
View
Most Expensive
B
Do Amore Diamonds
27-E6BF10FE9 · Oct 30
£6,598 GBP
$8,840 USD
View
17 more retailers have this diamond
Prices start from £743 GBPSave up to £5,854 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+
3.18ct Radiant
£743 GBP