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Round|Lab Grown|IGI

1.78ct E SI2 Round Lab Grown Diamond

VG • E/SI2 • IGI LG786624855

Shape and cutting style on the report: Round brilliant

Certificate IGI LG786624855

Diamond specifications and retailer prices

From $316 CAD
$226 USD
As of October 29, 2026
Save $1,825 CAD (85%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,141 CAD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

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 SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI LG786624855 or 786624855. Listed at 13 retailers as of October 29, 2026, with prices from $316 to $2,141, a $1,825 spread on the same certified stone. Brilliant Earth lists it at $2,141. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.78
Carat
E
Color
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG786624855
Dimensions7.74 × 7.62 × 4.78 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.74 mm7.62 mm1.78 ctE / SI2
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG786624855
Side View
Table 59.0%Crown 37°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 62.1%

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 29
Current: $2,141 CAD|Low: $302 CAD|High: $2,141 CAD|Avg: $886 CAD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 29, 2026
Retailer 9$316 CAD
Retailer 11$354 CAD
Retailer 3$392 CAD
Retailer 6$648 CAD
Retailer 12$665 CAD
Retailer 2$726 CAD
Retailer 10$760 CAD
Retailer 4$955 CAD
Retailer 8$1,062 CAD
Retailer 7$1,134 CAD
Retailer 5$1,577 CAD
Brilliant Earth$2,141 CAD

29 data points across 12 retailers

13 retailers$316 CAD to $2,141 CAD

A
Cheapest Retailer
-
$316 CAD
$226 USD
A
Retailer 2
-
$354 CAD
$253 USD
View
Final sale: no returns
A
Retailer 3
-
$392 CAD
$280 USD
View
A
Retailer 4
-
$648 CAD
€441 EUR
View
B+
Retailer 5
-
$665 CAD
$475 USD
View
B+
Retailer 6
-
$726 CAD
£409 GBP
View
B+
Retailer 7
-
$760 CAD
$543 USD
View
B+
Retailer 8
-
$955 CAD
$682 USD
View
B
Retailer 9
-
$1,062 CAD
$759 USD
View
B
Retailer 10
-
$1,134 CAD
$810 USD
View
Retailer 11
-
$1,169 CAD
$835 USD
View
Price last confirmed 44 days ago
B
Retailer 12
-
$1,577 CAD
£887 GBP
View
Most Expensive
B
Brilliant Earth
19892742A · Oct 29
$2,141 CAD
$1,530 USD
View
12 more retailers have this diamond
Prices start from $316 CADSave up to $1,825 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
$316 CAD