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Radiant|Lab Grown|IGI

1.87ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG780666186

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

Certificate IGI LG780666186

Diamond specifications and retailer prices

From £474 GBP
$635 USD
As of October 30, 2026
Save £3,735 GBP (89%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £4,209 GBP at Do Amore Diamonds · As of October 30, 2026
View at Do Amore Diamonds

About this 1.87ct lab-grown radiant diamond

This 1.87ct 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 LG780666186 or 780666186. Listed at 15 retailers as of October 30, 2026, with prices from £474 to £4,209, a £3,735 spread on the same certified stone. Do Amore Diamonds lists it at £4,209. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.87
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.3°
Pavilion angle32.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780666186
Dimensions8.98 × 6.19 × 3.86 mm
L/W Ratio1.45
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.98 mm6.19 mm1.87 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780666186
Side View
Table 65.0%Crown 41.3°Girdle: Slightly ThickPavilion 32.1°Culet: NoneDepth 62.4%

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: £4,209 GBP|Low: £450 GBP|High: £5,000 GBP|Avg: £2,087 GBP|-15.8%
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
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Retailer 16
October 30, 2026
Retailer 10£474 GBP
Retailer 16£516 GBP
Retailer 7£630 GBP
Retailer 12£676 GBP
Retailer 5£702 GBP
Retailer 11£899 GBP
Retailer 6£948 GBP
Retailer 3£1,016 GBP
Retailer 13£1,405 GBP
Retailer 15£1,633 GBP
Retailer 14£1,707 GBP
Retailer 9£2,396 GBP
Retailer 2£3,224 GBP
Retailer 4£3,370 GBP
Do Amore Diamonds£4,209 GBP
Retailer 8£4,247 GBP

32 data points across 16 retailers

15 retailers£474 GBP to £4,209 GBP

A
Cheapest Retailer
-
£474 GBP
$635 USD
A
Retailer 2
-
£516 GBP
$691 USD
View
A
Retailer 3
-
£630 GBP
$844 USD
View
Final sale: no returns
A
Retailer 4
-
£676 GBP
$906 USD
View
A
Retailer 5
-
£702 GBP
$940 USD
View
A
Retailer 6
-
£899 GBP
$1,204 USD
View
A
Retailer 7
-
£948 GBP
$1,270 USD
View
Retailer 8
-
£1,016 GBP
€1,297 EUR
View
Price last confirmed 7 days ago
B+
Retailer 9
-
£1,405 GBP
$1,882 USD
View
B+
Retailer 10
-
£1,633 GBP
$2,188 USD
View
B+
Retailer 11
-
£1,707 GBP
$2,287 USD
View
B+
Retailer 12
-
£2,396 GBP
View
B
Retailer 13
-
£3,224 GBP
$4,320 USD
View
Retailer 14
-
£3,370 GBP
$4,515 USD
View
Price last confirmed 9 days ago
Most Expensive
B
Do Amore Diamonds
27-7596FBE64 · Oct 30
£4,209 GBP
$5,640 USD
View
14 more retailers have this diamond
Prices start from £474 GBPSave up to £3,735 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
1.87ct Radiant
£474 GBP