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Cushion|Lab Grown|IGI

3.10ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG831684278

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG831684278

Diamond specifications and retailer prices

From $3,252 AUD
$2,279 USD
As of November 1, 2026
Save $15,697 AUD (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $18,949 AUD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 3.1ct lab-grown cushion diamond

This 3.1ct lab-grown cushion sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG831684278 or 831684278. Listed at 14 retailers as of October 31, 2026, with prices from $3,252 to $18,949, a $15,697 spread on the same certified stone. Brilliant Earth lists it at $18,949. 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

3.10
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle33.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831684278
Dimensions8.33 × 8.32 × 5.22 mm
L/W Ratio1.00
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
8.33 mm8.32 mm3.10 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831684278
Side View
Table 59.0%Crown 35.6°Girdle: MED-THKPavilion 33.7°Culet: NoneDepth 62.7%

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: Nov 1
Current: $18,949 AUD|Low: $3,252 AUD|High: $18,949 AUD|Avg: $7,332 AUD
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 2, 2026
Retailer 13$3,252 AUD
Retailer 9$3,554 AUD
Retailer 11$3,603 AUD
Retailer 14$3,890 AUD
Retailer 7$4,008 AUD
Retailer 8$4,635 AUD
Retailer 10$5,230 AUD
Retailer 2$5,270 AUD
Retailer 4$6,393 AUD
Retailer 5$7,963 AUD
Retailer 12$8,694 AUD
Retailer 6$9,353 AUD
Retailer 3$11,262 AUD
Brilliant Earth$18,949 AUD

6 data points across 14 retailers

14 retailers$3,252 AUD to $18,949 AUD

A
Cheapest Retailer
-
$3,252 AUD
$2,279 USD
Final sale: no returns
A
Retailer 2
-
$3,554 AUD
$2,491 USD
View
A
Retailer 3
-
$3,603 AUD
$2,525 USD
View
A
Retailer 4
-
$3,890 AUD
HK$21,300 HKD
View
A
Retailer 5
-
$4,008 AUD
£2,212 GBP
View
A
Retailer 6
-
$4,635 AUD
£2,558 GBP
View
A
Retailer 7
-
$5,230 AUD
€3,491 EUR
View
A
Retailer 8
-
$5,270 AUD
$3,693 USD
View
B+
Retailer 9
-
$6,393 AUD
£3,528 GBP
View
B+
Retailer 10
-
$7,963 AUD
ZAR 90,152 ZAR
View
B+
Retailer 11
-
$8,694 AUD
$6,093 USD
View
B+
Retailer 12
-
$9,353 AUD
£5,161 GBP
View
B
Retailer 13
-
$11,262 AUD
SGD 10,666 SGD
View
Most Expensive
B
Brilliant Earth
22341166A · Oct 31
$18,949 AUD
$13,280 USD
View
13 more retailers have this diamond
Prices start from $3,252 AUDSave up to $15,697 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
3.10ct Cushion
$3,252 AUD