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Cushion|Lab Grown|IGI

2.78ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG830624697

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG830624697

Diamond specifications and retailer prices

From $2,221 AUD
$1,560 USD
As of October 29, 2026
Save $13,608 AUD (86%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $15,828 AUD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 2.78ct lab-grown cushion diamond

This 2.78ct lab-grown cushion sits in the two to three carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG830624697 or 830624697. Listed at 10 retailers as of October 29, 2026, with prices from $2,221 to $15,828, a $13,608 spread on the same certified stone. Brilliant Earth lists it at $15,828. 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle38.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG830624697
Dimensions9.44 × 7.30 × 5.03 mm
L/W Ratio1.29
Girdle conditionFaceted
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
9.44 mm7.30 mm2.78 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG830624697
Side View
Table 60.0%Crown 33.9°Girdle: MED-THKPavilion 38.8°Culet: NoneDepth 68.9%

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 29
Current: $15,828 AUD|Low: $2,221 AUD|High: $16,383 AUD|Avg: $7,458 AUD|-2.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 6$2,221 AUD
Retailer 4$2,263 AUD
Retailer 9$3,627 AUD
Retailer 3$4,228 AUD
Retailer 7$4,518 AUD
Retailer 5$6,501 AUD
Retailer 8$6,852 AUD
Retailer 10$8,804 AUD
Retailer 2$9,540 AUD
Brilliant Earth$15,828 AUD

32 data points across 10 retailers

10 retailers$2,221 AUD to $15,828 AUD

A
Cheapest Retailer
-
$2,221 AUD
$1,560 USD
A
Retailer 2
-
$2,263 AUD
$1,590 USD
View
A
Retailer 3
-
$3,627 AUD
$2,548 USD
View
A
Retailer 4
-
$4,228 AUD
€2,829 EUR
View
A
Retailer 5
-
$4,518 AUD
$3,174 USD
View
B+
Retailer 6
-
$6,501 AUD
£3,596 GBP
View
B+
Retailer 7
-
$6,852 AUD
$4,814 USD
View
Retailer 8
-
$8,804 AUD
$6,185 USD
View
Price last confirmed 9 days ago
B+
Retailer 9
-
$9,540 AUD
$6,702 USD
View
Most Expensive
B
Brilliant Earth
21286525A · Oct 29
$15,828 AUD
$11,120 USD
View
9 more retailers have this diamond
Prices start from $2,221 AUDSave up to $13,608 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.

A
2.78ct Cushion
$2,221 AUD