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Cushion|Lab Grown|IGI

1.20ct E VS1 Cushion Lab Grown Diamond

EX • E/VS1 • IGI LG805666656

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

Certificate IGI LG805666656

Diamond specifications and retailer prices

From $299 AUD
$210 USD
As of October 31, 2026
Save $1,481 AUD (83%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,780 AUD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.2ct lab-grown cushion diamond

This 1.2ct lab-grown cushion sits in the classic one-carat band, graded E colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG805666656 or 805666656. Listed at 16 retailers as of October 29, 2026, with prices from $299 to $1,780, a $1,481 spread on the same certified stone. Brilliant Earth lists it at $1,780. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.20
Carat
E
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38°
Pavilion angle38.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG805666656
Dimensions6.19 × 6.14 × 4.03 mm
L/W Ratio1.01
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
6.19 mm6.14 mm1.20 ctE / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG805666656
Side View
Table 64.0%Crown 38°Girdle: STK-THKPavilion 38.4°Culet: NoneDepth 65.6%

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 31
Current: $1,780 AUD|Low: $289 AUD|High: $1,780 AUD|Avg: $886 AUD|+11.6%
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
Retailer 17
Retailer 18
October 31, 2026
Retailer 2$299 AUD
Retailer 5$333 AUD
Retailer 15$416 AUD
Retailer 8$506 AUD
Retailer 17$544 AUD
Retailer 13$581 AUD
Retailer 11$600 AUD
Retailer 12$609 AUD
Retailer 9$789 AUD
Retailer 7$790 AUD
Retailer 6$814 AUD
Retailer 3$932 AUD
Retailer 4$967 AUD
Retailer 16$1,141 AUD
Retailer 18$1,510 AUD
Retailer 10$1,605 AUD
Retailer 14$1,643 AUD
Brilliant Earth$1,780 AUD

17 data points across 18 retailers

16 retailers$299 AUD to $1,780 AUD

A
Cheapest Retailer
-
$299 AUD
$210 USD
Final sale: no returns
A
Retailer 2
-
$333 AUD
$234 USD
View
A
Retailer 3
-
$416 AUD
£230 GBP
View
A
Retailer 4
-
$544 AUD
€364 EUR
View
A
Retailer 5
-
$581 AUD
$408 USD
View
A
Retailer 6
-
$600 AUD
£332 GBP
View
A
Retailer 7
-
$609 AUD
$428 USD
View
B+
Retailer 8
-
$790 AUD
$555 USD
View
Retailer 9
-
$814 AUD
View
Price last confirmed 7 days ago
B+
Retailer 10
-
$911 AUD
$640 USD
View
B+
Retailer 11
-
$932 AUD
$655 USD
View
B+
Retailer 12
-
$967 AUD
View
B+
Retailer 13
-
$1,141 AUD
$801 USD
View
B
Retailer 14
-
$1,510 AUD
£835 GBP
View
B
Retailer 15
-
$1,643 AUD
$1,154 USD
View
Most Expensive
B
Brilliant Earth
20079173A · Oct 29
$1,780 AUD
$1,250 USD
View
15 more retailers have this diamond
Prices start from $299 AUDSave up to $1,481 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
1.20ct Cushion
$299 AUD