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Round|Lab Grown|IGI

1.18ct I SI1 Round Lab Grown Diamond

ID • I/SI1 • IGI LG375933901

Shape and cutting style on the report: Round brilliant

Certificate IGI LG375933901

Diamond specifications and retailer prices

From $375 USD
As of October 30, 2026
Save $713 USD (66%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,088 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.18ct lab-grown round diamond

This 1.18ct 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 LG375933901 or 375933901. Listed at 5 retailers as of October 29, 2026, with prices from $375 to $1,088, a $713 spread on the same certified stone. MOH London lists it at $1,088. 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

1.18
Carat
I
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG375933901
Dimensions6.77 × 6.74 × 4.19 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Chemical Vapor Deposition (CVD) laboratory grown diamond is classified as Type IIa
Top View
6.77 mm6.74 mm1.18 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG375933901
Side View
Table 55.5%Crown 36°Girdle: MediumPavilion 40.2°Culet: NoneDepth 62.0%

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 30
Current: $1,088 USD|Low: $350 USD|High: $1,096 USD|Avg: $577 USD|+0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 29, 2026
Retailer 3$375 USD
Retailer 2$420 USD
Retailer 5$472 USD
Retailer 4$533 USD
MOH London$1,088 USD

10 data points across 5 retailers

5 retailers$375 USD to $1,088 USD

A
Cheapest Retailer
-
$375 USD
Retailer 2
-
$420 USD
View
Price last confirmed 12 days ago
A
Retailer 3
-
$472 USD
View
A
Retailer 4
-
$533 USD
View
Most Expensive
A
MOH London
LG375933901 · Oct 29
$1,088 USD
£857 GBP
View
4 more retailers have this diamond
Prices start from $375 USDSave up to $713 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
1.18ct Round
$375 USD