CaratHunter
Plans
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 $610 USD
As of October 30, 2026
Save $3,772 USD (86%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $4,382 USD at MOH London · As of October 29, 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 29, 2026, with prices from $610 to $4,382, a $3,772 spread on the same certified stone. MOH London lists it at $4,382. 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
Color
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 30
Current: $4,382 USD|Low: $610 USD|High: $4,416 USD|Avg: $1,880 USD|-0.5%
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
October 30, 2026
Retailer 2$610 USD
Retailer 9$1,169 USD
Retailer 3$1,272 USD
Retailer 13$1,310 USD
Retailer 10$1,356 USD
Retailer 12$1,356 USD
Retailer 4$1,530 USD
Retailer 7$1,781 USD
Retailer 5$1,908 USD
Retailer 11$2,153 USD
Retailer 8$2,323 USD
Retailer 14$2,542 USD
Retailer 6$2,673 USD
MOH London$4,382 USD

36 data points across 14 retailers

13 retailers$610 USD to $4,382 USD

A
Cheapest Retailer
-
$610 USD
B+
Retailer 2
-
$1,169 USD
View
B+
Retailer 3
-
$1,272 USD
View
B+
Retailer 4
-
$1,310 USD
View
Final sale: no returns
B+
Retailer 5
-
$1,356 USD
View
Retailer 6
-
$1,356 USD
View
Price last confirmed 18 days ago
B+
Retailer 7
-
$1,530 USD
View
B+
Retailer 8
-
$1,781 USD
£1,402 GBP
View
B
Retailer 9
-
$2,153 USD
View
B
Retailer 10
-
$2,323 USD
€2,212 EUR
View
B
Retailer 11
-
$2,542 USD
View
B
Retailer 12
-
$2,673 USD
View
Most Expensive
B
MOH London
LG492123220 · Oct 29
$4,382 USD
£3,450 GBP
View
12 more retailers have this diamond
Prices start from $610 USDSave up to $3,772 USD

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
$610 USD