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Radiant|Lab Grown|IGI

3.10ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG780666217

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

Certificate IGI LG780666217

Diamond specifications and retailer prices

From $1,685 USD
As of October 27, 2026
Save $11,355 USD (87%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $13,040 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 3.1ct lab-grown radiant diamond

This 3.1ct lab-grown radiant sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG780666217 or 780666217. Listed at 15 retailers as of October 27, 2026, with prices from $1,685 to $13,040, a $11,355 spread on the same certified stone. Brilliant Earth lists it at $13,040. 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

3.10
Carat
D
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.9°
Pavilion angle33°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780666217
Dimensions10.18 × 7.26 × 4.73 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
10.18 mm7.26 mm3.10 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780666217
Side View
Table 61.0%Crown 41.9°Girdle: ThickPavilion 33°Culet: NoneDepth 65.2%

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 27
Current: $13,040 USD|Low: $1,685 USD|High: $16,600 USD|Avg: $5,403 USD|-3.0%
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
October 29, 2026
Retailer 11$1,685 USD
Retailer 4$1,833 USD
Retailer 10$2,020 USD
Retailer 13$2,061 USD
Retailer 3$2,504 USD
Retailer 7$2,842 USD
Retailer 12$3,071 USD
Retailer 14$3,370 USD
Retailer 5$3,641 USD
Retailer 9$4,034 USD
Retailer 8$5,401 USD
Retailer 2$6,180 USD
Retailer 6$6,345 USD
Retailer 15$11,590 USD
Brilliant Earth$13,040 USD

32 data points across 15 retailers

15 retailers$1,685 USD to $13,040 USD

A
Cheapest Retailer
-
$1,685 USD
A
Retailer 2
-
$1,833 USD
View
A
Retailer 3
-
$2,020 USD
View
A
Retailer 4
-
$2,061 USD
View
A
Retailer 5
-
$2,504 USD
View
A
Retailer 6
-
$2,842 USD
View
Final sale: no returns
A
Retailer 7
-
$3,071 USD
View
A
Retailer 8
-
$3,370 USD
View
B+
Retailer 9
-
$3,641 USD
€3,468 EUR
View
B+
Retailer 10
-
$4,034 USD
View
B+
Retailer 11
-
$5,401 USD
View
B+
Retailer 12
-
$6,180 USD
£4,866 GBP
View
B+
Retailer 13
-
$6,345 USD
View
Price last confirmed 8 days ago
B
Retailer 14
-
$11,590 USD
View
Most Expensive
B
Brilliant Earth
19065709Y · Oct 29
$13,040 USD
View
14 more retailers have this diamond
Prices start from $1,685 USDSave up to $11,355 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
3.10ct Radiant
$1,685 USD