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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 $2,688 AUD
€1,798 EUR
As of October 31, 2026
Save $7,320 AUD (73%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $10,008 AUD at Brilliant Earth · As of October 30, 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 30, 2026, with prices from $2,688 to $10,008, a $7,320 spread on the same certified stone. Brilliant Earth lists it at $10,008. 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 →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $10,008 AUD|Low: $2,601 AUD|High: $11,873 AUD|Avg: $5,788 AUD|-15.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 31, 2026
Retailer 2$2,688 AUD
Retailer 5$4,346 AUD
Retailer 6$4,985 AUD
Retailer 3$6,077 AUD
Retailer 4$6,094 AUD
Brilliant Earth$10,008 AUD

8 data points across 6 retailers

6 retailers$2,688 AUD to $10,008 AUD

Cheapest Retailer
-
$2,688 AUD
€1,798 EUR
B+
Retailer 2
-
$4,346 AUD
$3,053 USD
View
B+
Retailer 3
-
$4,985 AUD
$3,502 USD
View
Retailer 4
-
$6,077 AUD
View
B+
Retailer 5
-
$6,094 AUD
$4,281 USD
View
Most Expensive
B
Brilliant Earth
22254885A · Oct 30
$10,008 AUD
$7,030 USD
View
5 more retailers have this diamond
Prices start from $2,688 AUDSave up to $7,320 AUD

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.

B+
2.78ct Radiant
$2,688 AUD