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Round|Lab Grown|IGI

1.05ct I SI1 Round Lab Grown Diamond

ID • I/SI1 • IGI LG492123220

Shape and cutting style on the report: Round brilliant

Certificate IGI LG492123220

Diamond specifications and retailer prices

From $1,082 NZD
$610 USD
As of October 31, 2026
Save $6,649 NZD (86%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $7,731 NZD at MOH London · As of November 1, 2026
View at MOH London

About this 1.05ct lab-grown round diamond

This 1.05ct lab-grown round sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG492123220 or 492123220. Listed at 13 retailers as of October 31, 2026, with prices from $1,082 to $7,731, a $6,649 spread on the same certified stone. MOH London lists it at $7,731. 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
I
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.9°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG492123220
Dimensions6.54 × 6.56 × 4.01 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
6.54 mm6.56 mm1.05 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG492123220
Side View
Table 57.0%Crown 32.9°Girdle: MediumPavilion 40.9°Culet: NoneDepth 61.2%

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: $7,731 NZD|Low: $1,082 NZD|High: $7,835 NZD|Avg: $3,344 NZD|-1.1%
MOH London
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
November 1, 2026
Retailer 7$1,082 NZD
Retailer 9$2,074 NZD
Retailer 3$2,257 NZD
Retailer 13$2,324 NZD
Retailer 10$2,406 NZD
Retailer 12$2,406 NZD
Retailer 4$2,715 NZD
Retailer 2$3,150 NZD
Retailer 5$3,385 NZD
Retailer 11$3,820 NZD
Retailer 8$4,121 NZD
Retailer 14$4,510 NZD
Retailer 6$4,743 NZD
MOH London$7,731 NZD

36 data points across 14 retailers

13 retailers$1,082 NZD to $7,731 NZD

A
Cheapest Retailer
-
$1,082 NZD
$610 USD
B+
Retailer 2
-
$2,074 NZD
$1,169 USD
View
B+
Retailer 3
-
$2,257 NZD
$1,272 USD
View
B+
Retailer 4
-
$2,324 NZD
$1,310 USD
View
Final sale: no returns
B+
Retailer 5
-
$2,406 NZD
$1,356 USD
View
Retailer 6
-
$2,406 NZD
$1,356 USD
View
Price last confirmed 20 days ago
B+
Retailer 7
-
$2,715 NZD
$1,530 USD
View
B+
Retailer 8
-
$3,150 NZD
£1,398 GBP
View
B
Retailer 9
-
$3,820 NZD
$2,153 USD
View
B
Retailer 10
-
$4,121 NZD
€2,212 EUR
View
B
Retailer 11
-
$4,510 NZD
$2,542 USD
View
B
Retailer 12
-
$4,743 NZD
$2,673 USD
View
Most Expensive
B
MOH London
LG492123220 · Nov 1
$7,731 NZD
£3,431 GBP
View
12 more retailers have this diamond
Prices start from $1,082 NZDSave up to $6,649 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
$1,082 NZD