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Radiant|Lab Grown|IGI

1.71ct D FL Radiant Lab Grown Diamond

EX • D/FL • IGI LG818654487

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

Certificate IGI LG818654487

Diamond specifications and retailer prices

From £435 GBP
$583 USD
As of October 30, 2026
Save £3,431 GBP (89%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £3,866 GBP at Do Amore Diamonds · As of October 30, 2026
View at Do Amore Diamonds

About this 1.71ct lab-grown radiant diamond

This 1.71ct lab-grown radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818654487 or 818654487. Listed at 12 retailers as of October 30, 2026, with prices from £435 to £3,866, a £3,431 spread on the same certified stone. Do Amore Diamonds lists it at £3,866. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.71
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.4°
Pavilion angle31.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818654487
Dimensions8.71 × 5.86 × 3.83 mm
L/W Ratio1.49
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
8.71 mm5.86 mm1.71 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818654487
Side View
Table 63.0%Crown 44.4°Girdle: MED-STKPavilion 31.9°Culet: NoneDepth 65.4%

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: £3,866 GBP|Low: £435 GBP|High: £4,956 GBP|Avg: £2,082 GBP|-15.6%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 7£435 GBP
Retailer 11£487 GBP
Retailer 3£649 GBP
Retailer 4£805 GBP
Retailer 8£829 GBP
Retailer 12£953 GBP
Retailer 9£1,339 GBP
Retailer 10£1,567 GBP
Retailer 6£2,360 GBP
Retailer 5£2,405 GBP
Retailer 2£2,836 GBP
Retailer 13£3,026 GBP
Do Amore Diamonds£3,866 GBP

30 data points across 13 retailers

12 retailers£435 GBP to £3,866 GBP

A
Cheapest Retailer
-
£435 GBP
$583 USD
A
Retailer 2
-
£487 GBP
$653 USD
View
A
Retailer 3
-
£649 GBP
$870 USD
View
A
Retailer 4
-
£805 GBP
$1,079 USD
View
A
Retailer 5
-
£829 GBP
$1,111 USD
View
Retailer 6
-
£953 GBP
€1,216 EUR
View
Price last confirmed 7 days ago
B+
Retailer 7
-
£1,339 GBP
$1,794 USD
View
B+
Retailer 8
-
£1,567 GBP
$2,099 USD
View
B
Retailer 9
-
£2,360 GBP
View
B
Retailer 10
-
£2,836 GBP
$3,800 USD
View
B
Retailer 11
-
£3,026 GBP
$4,055 USD
View
Most Expensive
B
Do Amore Diamonds
27-D7290C018 · Oct 30
£3,866 GBP
$5,180 USD
View
11 more retailers have this diamond
Prices start from £435 GBPSave up to £3,431 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
1.71ct Radiant
£435 GBP