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Round|Lab Grown|IGI

1.05ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG620431074

Shape and cutting style on the report: Round brilliant

Certificate IGI LG620431074

Diamond specifications and retailer prices

From $400 NZD
As of November 5, 2026
Save $1,737 NZD (81%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $2,137 NZD at Reve Diamonds · As of November 4, 2026
View at Reve Diamonds

About this 1.05ct lab-grown round diamond

This 1.05ct lab-grown round sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG620431074 or 620431074. Listed at 18 retailers as of November 4, 2026, with prices from $400 to $2,137, a $1,737 spread on the same certified stone. Reve Diamonds lists it at $2,137. 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

1.05
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620431074
Dimensions6.56 × 6.58 × 4.00 mm
L/W Ratio1.00
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
6.56 mm6.58 mm1.05 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620431074
Side View
Table 57.0%Crown 33.5°Girdle: MediumPavilion 41.1°Culet: NoneDepth 60.8%

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: Nov 5
Current: $809 NZD|Low: $345 NZD|High: $2,137 NZD|Avg: $929 NZD|+5.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Reve Diamonds
November 6, 2026
Retailer 12$359 NZD
Retailer 3$400 NZD
Retailer 4$447 NZD
Retailer 13$447 NZD
Retailer 11$551 NZD
Retailer 9$758 NZD
Retailer 2$774 NZD
Retailer 1$809 NZD
Retailer 6$863 NZD
Retailer 10$957 NZD
Retailer 5$1,003 NZD
Retailer 8$1,160 NZD
Retailer 7$2,080 NZD
Reve Diamonds$2,137 NZD

41 data points across 14 retailers

18 retailers$400 NZD to $2,137 NZD

Retailer 1
-
$359 NZD
Price last confirmed 17 days ago
A
Retailer 2
-
$400 NZD
View
Final sale: no returns
Retailer 3
-
$418 NZD
View
Price last confirmed 17 days ago
Retailer 4
-
$447 NZD
View
Price last confirmed 21 days ago
Retailer 5
-
$447 NZD
View
Price last confirmed 16 days ago
A
Retailer 6
-
$551 NZD
View
Retailer 7
-
$729 NZD
View
Price last confirmed 58 days ago
B+
Retailer 8
-
$758 NZD
View
B+
Retailer 9
-
$774 NZD
View
B+
Retailer 10
-
$809 NZD
View
B+
Retailer 11
-
$863 NZD
View
B+
Retailer 12
-
$957 NZD
View
B
Retailer 13
-
$1,003 NZD
View
B
Retailer 14
-
$1,160 NZD
View
Retailer 15
-
$1,436 NZD
View
Price last confirmed 16 days ago
B
Retailer 16
-
$1,530 NZD
View
B
Retailer 17
-
$2,080 NZD
View
Most Expensive
B
Reve Diamonds
C3DE76E96 · Nov 4
$2,137 NZD
$1,201 USD
View
17 more retailers have this diamond
Prices start from $400 NZDSave up to $1,737 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
1.05ct Round
$400 NZD