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Round|Lab Grown|IGI

2.78ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG762545352

Shape and cutting style on the report: Round brilliant

Certificate IGI LG762545352

Diamond specifications and retailer prices

From $1,653 AUD
$1,161 USD
As of November 1, 2026
Save $8,811 AUD (84%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $10,463 AUD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 2.78ct lab-grown round diamond

This 2.78ct lab-grown round 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 LG762545352 or 762545352. Listed at 17 retailers as of October 31, 2026, with prices from $1,653 to $10,463, a $8,811 spread on the same certified stone. Brilliant Earth lists it at $10,463. 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 angle33.4°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG762545352
Dimensions9.10 × 9.14 × 5.47 mm
L/W Ratio1.00
Girdle conditionFaceted
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
9.10 mm9.14 mm2.78 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG762545352
Side View
Table 59.0%Crown 33.4°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.0%

Caratlytics Score

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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: Nov 1
Current: $10,463 AUD|Low: $1,653 AUD|High: $13,111 AUD|Avg: $4,582 AUD|-20.2%
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
November 1, 2026
Retailer 4$1,653 AUD
Retailer 12$2,071 AUD
Retailer 2$2,101 AUD
Retailer 9$2,136 AUD
Retailer 7$2,194 AUD
Retailer 5$2,575 AUD
Retailer 6$3,518 AUD
Retailer 8$3,541 AUD
Retailer 14$4,204 AUD
Retailer 10$5,173 AUD
Retailer 11$5,812 AUD
Retailer 13$7,417 AUD
Retailer 3$10,095 AUD
Brilliant Earth$10,463 AUD

42 data points across 14 retailers

17 retailers$1,653 AUD to $10,463 AUD

A
Cheapest Retailer
-
$1,653 AUD
$1,161 USD
A
Retailer 2
-
$1,786 AUD
HK$9,800 HKD
View
A
Retailer 3
-
$2,071 AUD
$1,455 USD
View
Retailer 4
-
$2,082 AUD
£1,152 GBP
View
Price last confirmed 17 days ago
A
Retailer 5
-
$2,101 AUD
£1,162 GBP
View
A
Retailer 6
-
$2,136 AUD
View
A
Retailer 7
-
$2,194 AUD
€1,468 EUR
View
A
Retailer 8
-
$2,575 AUD
$1,809 USD
View
B+
Retailer 9
-
$3,518 AUD
$2,471 USD
View
B+
Retailer 10
-
$3,541 AUD
ZAR 40,182 ZAR
View
B+
Retailer 11
-
$4,204 AUD
$2,953 USD
View
B+
Retailer 12
-
$4,900 AUD
$3,442 USD
View
B+
Retailer 13
-
$5,173 AUD
£2,861 GBP
View
Retailer 14
-
$5,812 AUD
View
Price last confirmed 23 days ago
Retailer 15
-
$7,417 AUD
$5,210 USD
View
Price last confirmed 17 days ago
B
Retailer 16
-
$10,095 AUD
$7,091 USD
View
Most Expensive
B
Brilliant Earth
19080341Y · Oct 31
$10,463 AUD
$7,350 USD
View
16 more retailers have this diamond
Prices start from $1,653 AUDSave up to $8,811 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 Round
$1,653 AUD