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Round|Lab Grown|IGI

1.77ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG620415433

Shape and cutting style on the report: Round brilliant

Certificate IGI LG620415433

Diamond specifications and retailer prices

From $352 AUD
$247 USD
As of October 29, 2026
Save $1,983 AUD (85%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $2,334 AUD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.77ct lab-grown round diamond

This 1.77ct lab-grown round 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 LG620415433 or 620415433. Listed at 19 retailers as of October 29, 2026, with prices from $352 to $2,334, a $1,983 spread on the same certified stone. Brilliant Earth lists it at $2,334. 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 angle33.2°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620415433
Dimensions7.82 × 7.86 × 4.75 mm
L/W Ratio1.01
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
7.82 mm7.86 mm1.77 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620415433
Side View
Table 59.0%Crown 33.2°Girdle: MediumPavilion 41.1°Culet: NoneDepth 60.6%

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: $2,334 AUD|Low: $337 AUD|High: $2,619 AUD|Avg: $999 AUD|+9.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 8$352 AUD
Retailer 9$436 AUD
Retailer 10$436 AUD
Retailer 7$586 AUD
Retailer 4$719 AUD
Retailer 2$755 AUD
Retailer 3$825 AUD
Retailer 5$1,406 AUD
Retailer 6$1,750 AUD
Brilliant Earth$2,334 AUD

37 data points across 10 retailers

19 retailers$352 AUD to $2,334 AUD

A
Cheapest Retailer
-
$352 AUD
$247 USD
Retailer 2
-
$352 AUD
$247 USD
View
Price last confirmed 35 days ago
A
Retailer 3
-
$394 AUD
$277 USD
View
Final sale: no returns
Retailer 4
-
$409 AUD
$287 USD
View
Price last confirmed 38 days ago
Retailer 5
-
$430 AUD
$302 USD
View
Price last confirmed 34 days ago
A
Retailer 6
-
$436 AUD
$306 USD
View
A
Retailer 7
-
$436 AUD
$306 USD
View
A
Retailer 8
-
$492 AUD
HK$2,700 HKD
View
B+
Retailer 9
-
$586 AUD
$412 USD
View
A
Retailer 10
-
$719 AUD
€481 EUR
View
A
Retailer 11
-
$755 AUD
£418 GBP
View
B+
Retailer 12
-
$807 AUD
$567 USD
View
A
Retailer 13
-
$825 AUD
£456 GBP
View
B+
Retailer 14
-
$914 AUD
$642 USD
View
B
Retailer 15
-
$1,402 AUD
$985 USD
View
Retailer 16
-
$1,402 AUD
$985 USD
View
Price last confirmed 39 days ago
B
Retailer 17
-
$1,406 AUD
$988 USD
View
B
Retailer 18
-
$1,750 AUD
£968 GBP
View
Most Expensive
B
Brilliant Earth
19043514A · Oct 29
$2,334 AUD
$1,640 USD
View
18 more retailers have this diamond
Prices start from $352 AUDSave up to $1,983 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 Round
$352 AUD