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Radiant|Lab Grown|IGI

2.78ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG844644966

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

Certificate IGI LG844644966

Diamond specifications and retailer prices

From $3,350 NZD
€1,798 EUR
As of October 31, 2026
Save $9,230 NZD (73%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $12,580 NZD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 2.78ct lab-grown radiant diamond

This 2.78ct lab-grown radiant sits in the two to three carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG844644966 or 844644966. Listed at 6 retailers as of October 31, 2026, with prices from $3,350 to $12,580, a $9,230 spread on the same certified stone. Brilliant Earth lists it at $12,580. 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

2.78
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41°
Pavilion angle37°
OriginLab Grown
Grading LabIGI
CertificateIGI LG844644966
Dimensions8.01 × 7.77 × 5.19 mm
L/W Ratio1.03
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
8.01 mm7.77 mm2.78 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG844644966
Side View
Table 68.0%Crown 41°Girdle: Slightly ThickPavilion 37°Culet: NoneDepth 66.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $12,580 NZD|Low: $3,242 NZD|High: $14,798 NZD|Avg: $7,217 NZD|-15.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 31, 2026
Retailer 2$3,350 NZD
Retailer 5$5,417 NZD
Retailer 6$6,214 NZD
Retailer 3$7,574 NZD
Retailer 4$7,596 NZD
Brilliant Earth$12,580 NZD

8 data points across 6 retailers

6 retailers$3,350 NZD to $12,580 NZD

A
Cheapest Retailer
-
$3,350 NZD
€1,798 EUR
B+
Retailer 2
-
$5,417 NZD
$3,053 USD
View
B+
Retailer 3
-
$6,214 NZD
$3,502 USD
View
B+
Retailer 4
-
$7,574 NZD
A$6,567 AUD
View
B+
Retailer 5
-
$7,596 NZD
$4,281 USD
View
Most Expensive
B
Brilliant Earth
22254885A · Oct 31
$12,580 NZD
$7,090 USD
View
5 more retailers have this diamond
Prices start from $3,350 NZDSave up to $9,230 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
2.78ct Radiant
$3,350 NZD