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Cushion|Lab Grown|IGI

2.78ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG816616094

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG816616094

Diamond specifications and retailer prices

From $2,512 AUD
$1,765 USD
As of October 29, 2026
Save $13,302 AUD (84%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $15,814 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 LG816616094 or 816616094. Listed at 16 retailers as of October 29, 2026, with prices from $2,512 to $15,814, a $13,302 spread on the same certified stone. Brilliant Earth lists it at $15,814. 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 angle34.8°
Pavilion angle37.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816616094
Dimensions10.17 × 6.89 × 4.56 mm
L/W Ratio1.48
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
10.17 mm6.89 mm2.78 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816616094
Side View
Table 64.0%Crown 34.8°Girdle: STK-THKPavilion 37.4°Culet: NoneDepth 66.2%

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 29
Current: $15,814 AUD|Low: $2,252 AUD|High: $16,383 AUD|Avg: $6,243 AUD|-3.5%
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
Retailer 16
October 30, 2026
Retailer 8$2,333 AUD
Retailer 12$2,512 AUD
Retailer 15$2,611 AUD
Retailer 2$3,196 AUD
Retailer 3$3,580 AUD
Retailer 4$3,845 AUD
Retailer 10$4,340 AUD
Retailer 13$4,482 AUD
Retailer 14$5,467 AUD
Retailer 9$5,845 AUD
Retailer 16$6,106 AUD
Retailer 11$7,318 AUD
Retailer 6$7,965 AUD
Retailer 7$8,832 AUD
Retailer 5$9,140 AUD
Brilliant Earth$15,814 AUD

31 data points across 16 retailers

16 retailers$2,512 AUD to $15,814 AUD

Retailer 1
-
$2,333 AUD
$1,639 USD
Price last confirmed 17 days ago
A
Retailer 2
-
$2,512 AUD
$1,765 USD
View
A
Retailer 3
-
$2,611 AUD
$1,834 USD
View
Final sale: no returns
A
Retailer 4
-
$3,196 AUD
£1,768 GBP
View
A
Retailer 5
-
$3,580 AUD
$2,515 USD
View
A
Retailer 6
-
$3,845 AUD
$2,701 USD
View
A
Retailer 7
-
$4,340 AUD
€2,904 EUR
View
A
Retailer 8
-
$4,482 AUD
$3,149 USD
View
A
Retailer 9
-
$5,467 AUD
£3,024 GBP
View
B+
Retailer 10
-
$5,845 AUD
ZAR 66,342 ZAR
View
B+
Retailer 11
-
$6,106 AUD
$4,290 USD
View
B+
Retailer 12
-
$7,318 AUD
£4,048 GBP
View
B+
Retailer 13
-
$7,965 AUD
$5,596 USD
View
Retailer 14
-
$8,832 AUD
$6,205 USD
View
Price last confirmed 9 days ago
B+
Retailer 15
-
$9,140 AUD
SGD 8,677 SGD
View
Most Expensive
B
Brilliant Earth
21421918A · Oct 29
$15,814 AUD
$11,110 USD
View
15 more retailers have this diamond
Prices start from $2,512 AUDSave up to $13,302 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
$2,512 AUD