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Radiant|Lab Grown|IGI

2.78ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG743563466

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

Certificate IGI LG743563466

Diamond specifications and retailer prices

From $5,748 AUD
$4,038 USD
As of October 31, 2026
Save $5,043 AUD (47%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $10,791 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 LG743563466 or 743563466. Listed at 4 retailers as of October 30, 2026, with prices from $5,748 to $10,791, a $5,043 spread on the same certified stone. Brilliant Earth lists it at $10,791. 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 angle40.5°
Pavilion angle36.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG743563466
Dimensions10.24 × 6.98 × 4.47 mm
L/W Ratio1.47
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
10.24 mm6.98 mm2.78 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG743563466
Side View
Table 65.0%Crown 40.5°Girdle: MediumPavilion 36.4°Culet: NoneDepth 64.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $10,791 AUD|Low: $3,630 AUD|High: $20,920 AUD|Avg: $10,551 AUD|-33.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 4$3,630 AUD
Retailer 3$5,748 AUD
Retailer 2$7,431 AUD
Retailer 5$8,172 AUD
Retailer 7$10,498 AUD
Brilliant Earth$10,791 AUD
Retailer 6$20,920 AUD

15 data points across 7 retailers

4 retailers$5,748 AUD to $10,791 AUD

Retailer 1
-
$3,630 AUD
$2,550 USD
Price last confirmed 18 days ago
B+
Retailer 2
-
$5,748 AUD
$4,038 USD
View
Retailer 3
-
$7,431 AUD
$5,220 USD
View
Price last confirmed 10 days ago
Most Expensive
B
Brilliant Earth
21415797Y · Oct 30
$10,791 AUD
$7,580 USD
View
3 more retailers have this diamond
Prices start from $5,748 AUDSave up to $5,043 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
$5,748 AUD