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Round|Lab Grown|IGI

1.09ct I SI1 Round Lab Grown Diamond

ID • I/SI1 • IGI LG451057063

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451057063

Diamond specifications and retailer prices

From $640 USD
As of October 30, 2026
Save $3,904 USD (86%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $4,544 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.09ct lab-grown round diamond

This 1.09ct 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 LG451057063 or 451057063. Listed at 13 retailers as of October 29, 2026, with prices from $640 to $4,544, a $3,904 spread on the same certified stone. MOH London lists it at $4,544. 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

1.09
Carat
I
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451057063
Dimensions6.53 × 6.56 × 4.09 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
6.53 mm6.56 mm1.09 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451057063
Side View
Table 56.5%Crown 35.9°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 62.5%

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: $4,544 USD|Low: $640 USD|High: $4,581 USD|Avg: $1,941 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$640 USD
Retailer 9$1,213 USD
Retailer 13$1,319 USD
Retailer 3$1,358 USD
Retailer 10$1,407 USD
Retailer 12$1,407 USD
Retailer 4$1,580 USD
Retailer 7$1,847 USD
Retailer 5$1,971 USD
Retailer 11$2,231 USD
Retailer 8$2,408 USD
Retailer 14$2,637 USD
Retailer 6$2,695 USD
MOH London$4,544 USD

37 data points across 14 retailers

13 retailers$640 USD to $4,544 USD

A
Cheapest Retailer
-
$640 USD
B+
Retailer 2
-
$1,213 USD
View
B+
Retailer 3
-
$1,319 USD
View
B+
Retailer 4
-
$1,358 USD
View
Final sale: no returns
B+
Retailer 5
-
$1,407 USD
View
Retailer 6
-
$1,407 USD
View
Price last confirmed 18 days ago
B+
Retailer 7
-
$1,580 USD
View
B+
Retailer 8
-
$1,847 USD
£1,454 GBP
View
B
Retailer 9
-
$2,231 USD
View
B
Retailer 10
-
$2,408 USD
€2,293 EUR
View
B
Retailer 11
-
$2,637 USD
View
B
Retailer 12
-
$2,695 USD
View
Most Expensive
B
MOH London
LG451057063 · Oct 29
$4,544 USD
£3,578 GBP
View
12 more retailers have this diamond
Prices start from $640 USDSave up to $3,904 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
1.09ct Round
$640 USD