CaratHunter
Plans
Round|Lab Grown|IGI

1.78ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG645443632

Shape and cutting style on the report: Round brilliant

Certificate IGI LG645443632

Diamond specifications and retailer prices

From $355 CAD
$254 USD
As of October 28, 2026
Save $1,187 CAD (77%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,543 CAD at MOH London · As of October 26, 2026
View at MOH London

About this 1.78ct lab-grown round diamond

This 1.78ct lab-grown round sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG645443632 or 645443632. Listed at 12 retailers as of October 26, 2026, with prices from $355 to $1,543, a $1,187 spread on the same certified stone. MOH London lists it at $1,543. 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

1.78
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG645443632
Dimensions7.81 × 7.76 × 4.77 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.81 mm7.76 mm1.78 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG645443632
Side View
Table 58.0%Crown 33.2°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.4%

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 28
Current: $1,543 CAD|Low: $255 CAD|High: $1,596 CAD|Avg: $811 CAD|-2.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 8$355 CAD
Retailer 9$389 CAD
Retailer 6$507 CAD
Retailer 2$714 CAD
Retailer 10$746 CAD
Retailer 4$754 CAD
Retailer 5$788 CAD
Retailer 7$1,197 CAD
Retailer 3$1,240 CAD
MOH London$1,543 CAD

37 data points across 10 retailers

12 retailers$355 CAD to $1,543 CAD

A
Retailer 1
-
$318 CAD
$227 USD
Price last confirmed 30 days ago
A
Retailer 2
-
$355 CAD
$254 USD
View
Final sale: no returns
A
Retailer 3
-
$368 CAD
$263 USD
View
Price last confirmed 37 days ago
A
Retailer 4
-
$389 CAD
$278 USD
View
Price last confirmed 30 days ago
B+
Retailer 5
-
$507 CAD
$362 USD
View
A
Retailer 6
-
$714 CAD
£401 GBP
View
A
Retailer 7
-
$754 CAD
$539 USD
View
A
Retailer 8
-
$788 CAD
$563 USD
View
B+
Retailer 9
-
$1,197 CAD
$855 USD
View
B
Retailer 10
-
$1,240 CAD
$886 USD
View
B
Retailer 11
-
$1,265 CAD
$904 USD
View
Price last confirmed 29 days ago
Most Expensive
B
MOH London
LG645443632 · Oct 26
$1,543 CAD
£868 GBP
View
11 more retailers have this diamond
Prices start from $355 CADSave up to $1,187 CAD

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
1.78ct Round
$355 CAD