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 $635 USD
As of October 30, 2026
Save $5,305 USD (89%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $5,940 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

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 29, 2026, with prices from $635 to $5,940, a $5,305 spread on the same certified stone. Brilliant Earth lists it at $5,940. 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
Color
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

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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: $5,940 USD|Low: $603 USD|High: $6,700 USD|Avg: $2,813 USD|-3.1%
Brilliant Earth
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
Retailer 15
Retailer 16
October 29, 2026
Retailer 9$635 USD
Retailer 16$691 USD
Retailer 7$844 USD
Retailer 11$906 USD
Retailer 5$940 USD
Retailer 10$1,204 USD
Retailer 6$1,270 USD
Retailer 3$1,362 USD
Retailer 13$1,882 USD
Retailer 15$2,188 USD
Retailer 14$2,287 USD
Retailer 2$3,211 USD
Retailer 4$4,515 USD
Retailer 12$5,640 USD
Retailer 8$5,690 USD
Brilliant Earth$5,940 USD

31 data points across 16 retailers

15 retailers$635 USD to $5,940 USD

A
Cheapest Retailer
-
$635 USD
A
Retailer 2
-
$691 USD
View
A
Retailer 3
-
$844 USD
View
Final sale: no returns
A
Retailer 4
-
$906 USD
View
A
Retailer 5
-
$940 USD
View
A
Retailer 6
-
$1,204 USD
View
A
Retailer 7
-
$1,270 USD
View
B+
Retailer 8
-
$1,362 USD
€1,297 EUR
View
B+
Retailer 9
-
$1,882 USD
View
B+
Retailer 10
-
$2,188 USD
View
B+
Retailer 11
-
$2,287 USD
View
B+
Retailer 12
-
$3,211 USD
£2,528 GBP
View
Retailer 13
-
$4,515 USD
View
Price last confirmed 8 days ago
B
Retailer 14
-
$5,640 USD
View
Most Expensive
B
Brilliant Earth
18577642Y · Oct 29
$5,940 USD
View
14 more retailers have this diamond
Prices start from $635 USDSave up to $5,305 USD

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
$635 USD