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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 $2,983 NZD
$1,681 USD
As of October 30, 2026
Save $18,078 NZD (86%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $21,061 NZD at Brilliant Earth · As of October 30, 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 30, 2026, with prices from $2,983 to $21,061, a $18,078 spread on the same certified stone. Brilliant Earth lists it at $21,061. 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
Colour
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

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: $21,061 NZD|Low: $2,983 NZD|High: $29,453 NZD|Avg: $9,278 NZD|-11.7%
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 31, 2026
Retailer 10$2,983 NZD
Retailer 4$3,252 NZD
Retailer 9$3,650 NZD
Retailer 2$3,762 NZD
Retailer 12$4,441 NZD
Retailer 7$5,043 NZD
Retailer 3$5,449 NZD
Retailer 8$5,965 NZD
Retailer 5$6,461 NZD
Retailer 15$7,158 NZD
Retailer 14$9,582 NZD
Retailer 13$10,965 NZD
Retailer 6$11,258 NZD
Retailer 11$20,529 NZD
Brilliant Earth$21,061 NZD

34 data points across 15 retailers

15 retailers$2,983 NZD to $21,061 NZD

A
Cheapest Retailer
-
$2,983 NZD
$1,681 USD
A
Retailer 2
-
$3,252 NZD
$1,833 USD
View
A
Retailer 3
-
$3,650 NZD
$2,057 USD
View
A
Retailer 4
-
$3,762 NZD
$2,120 USD
View
A
Retailer 5
-
$4,441 NZD
$2,503 USD
View
A
Retailer 6
-
$5,043 NZD
$2,842 USD
View
Final sale: no returns
A
Retailer 7
-
$5,449 NZD
$3,071 USD
View
A
Retailer 8
-
$5,965 NZD
$3,362 USD
View
Retailer 9
-
$6,461 NZD
€3,468 EUR
View
Price last confirmed 8 days ago
B+
Retailer 10
-
$7,158 NZD
$4,034 USD
View
B+
Retailer 11
-
$9,582 NZD
$5,401 USD
View
B+
Retailer 12
-
$10,965 NZD
£4,866 GBP
View
Retailer 13
-
$11,258 NZD
$6,345 USD
View
Price last confirmed 10 days ago
B
Retailer 14
-
$20,529 NZD
$11,570 USD
View
Most Expensive
B
Brilliant Earth
19065709Y · Oct 30
$21,061 NZD
$11,870 USD
View
14 more retailers have this diamond
Prices start from $2,983 NZDSave up to $18,078 NZD

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
$2,983 NZD