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Cushion|Lab Grown|IGI

1.77ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG557212760

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG557212760

Diamond specifications and retailer prices

From $342 AUD
$240 USD
As of October 27, 2026
Save $2,420 AUD (88%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $2,761 AUD at Do Amore Diamonds · As of October 27, 2026
View at Do Amore Diamonds

About this 1.77ct lab-grown cushion diamond

This 1.77ct lab-grown cushion sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG557212760 or 557212760. Listed at 5 retailers as of October 27, 2026, with prices from $342 to $2,761, a $2,420 spread on the same certified stone. Do Amore Diamonds lists it at $2,761. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.77
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.3°
Pavilion angle37.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG557212760
Dimensions7.80 × 6.45 × 4.37 mm
L/W Ratio1.21
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.80 mm6.45 mm1.77 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG557212760
Side View
Table 60.0%Crown 37.3°Girdle: MED-STKPavilion 37.5°Culet: NoneDepth 67.8%

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 27
Current: $2,761 AUD|Low: $228 AUD|High: $2,961 AUD|Avg: $1,282 AUD|-6.7%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 25, 2026
Retailer 5$342 AUD
Retailer 4$619 AUD
Retailer 9$686 AUD
Retailer 10$814 AUD
Retailer 6$897 AUD
Retailer 8$1,189 AUD
Retailer 3$1,452 AUD
Retailer 2$1,580 AUD
Retailer 7$2,277 AUD
Do Amore Diamonds$2,761 AUD

14 data points across 10 retailers

5 retailers$342 AUD to $2,761 AUD

A
Cheapest Retailer
-
$342 AUD
$240 USD
Final sale: no returns
B+
Retailer 2
-
$619 AUD
$435 USD
View
B+
Retailer 3
-
$1,452 AUD
$1,020 USD
View
Price last confirmed 8 days ago
B+
Retailer 4
-
$1,580 AUD
£874 GBP
View
Most Expensive
B
Do Amore Diamonds
27-CE48E08F2 · Oct 27
$2,761 AUD
$1,940 USD
View
4 more retailers have this diamond
Prices start from $342 AUDSave up to $2,420 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
1.77ct Cushion
$342 AUD