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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 $440 NZD
$247 USD
As of October 29, 2026
Save $2,480 NZD (85%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $2,920 NZD 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 $440 to $2,920, a $2,480 spread on the same certified stone. Brilliant Earth lists it at $2,920. 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: $2,920 NZD|Low: $422 NZD|High: $3,276 NZD|Avg: $1,173 NZD|+9.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 29, 2026
Retailer 9$440 NZD
Retailer 3$493 NZD
Retailer 10$545 NZD
Retailer 11$545 NZD
Retailer 8$734 NZD
Retailer 5$899 NZD
Retailer 4$947 NZD
Retailer 2$1,031 NZD
Retailer 6$1,759 NZD
Retailer 7$2,189 NZD
Brilliant Earth$2,920 NZD

36 data points across 11 retailers

19 retailers$440 NZD to $2,920 NZD

A
Cheapest Retailer
-
$440 NZD
$247 USD
A
Retailer 2
-
$440 NZD
$247 USD
View
Price last confirmed 34 days ago
A
Retailer 3
-
$493 NZD
$277 USD
View
Final sale: no returns
A
Retailer 4
-
$511 NZD
$287 USD
View
Price last confirmed 37 days ago
A
Retailer 5
-
$538 NZD
$302 USD
View
Price last confirmed 33 days ago
A
Retailer 6
-
$545 NZD
$306 USD
View
A
Retailer 7
-
$545 NZD
$306 USD
View
A
Retailer 8
-
$615 NZD
HK$2,700 HKD
View
B+
Retailer 9
-
$734 NZD
$412 USD
View
A
Retailer 10
-
$899 NZD
€481 EUR
View
A
Retailer 11
-
$947 NZD
£419 GBP
View
B+
Retailer 12
-
$1,010 NZD
$567 USD
View
A
Retailer 13
-
$1,031 NZD
£456 GBP
View
B+
Retailer 14
-
$1,143 NZD
$642 USD
View
B
Retailer 15
-
$1,754 NZD
$985 USD
View
B
Retailer 16
-
$1,754 NZD
$985 USD
View
Price last confirmed 38 days ago
B
Retailer 17
-
$1,759 NZD
$988 USD
View
B
Retailer 18
-
$2,189 NZD
£968 GBP
View
Most Expensive
B
Brilliant Earth
19043514A · Oct 29
$2,920 NZD
$1,640 USD
View
18 more retailers have this diamond
Prices start from $440 NZDSave up to $2,480 NZD

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
$440 NZD