CaratHunter
Plans
Round|Lab Grown|IGI

1.55ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG778645865

Shape and cutting style on the report: Round brilliant

Certificate IGI LG778645865

Diamond specifications and retailer prices

From $314 CAD
As of November 5, 2026
Save $1,962 CAD (86%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $2,276 CAD at Brilliant Earth · As of November 5, 2026
View at Brilliant Earth

About this 1.55ct lab-grown round diamond

This 1.55ct lab-grown round sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG778645865 or 778645865. Listed at 19 retailers as of November 5, 2026, with prices from $314 to $2,276, a $1,962 spread on the same certified stone. Brilliant Earth lists it at $2,276. 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

1.55
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778645865
Dimensions7.39 × 7.43 × 4.55 mm
L/W Ratio1.01
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
7.39 mm7.43 mm1.55 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778645865
Side View
Table 58.0%Crown 35.4°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 61.5%

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: Nov 5
Current: $2,276 CAD|Low: $302 CAD|High: $2,276 CAD|Avg: $825 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
Retailer 13
November 6, 2026
Retailer 10$314 CAD
Retailer 7$351 CAD
Retailer 3$365 CAD
Retailer 12$388 CAD
Retailer 11$524 CAD
Retailer 8$647 CAD
Retailer 6$715 CAD
Retailer 13$744 CAD
Retailer 5$1,137 CAD
Retailer 4$1,250 CAD
Retailer 2$1,254 CAD
Retailer 9$1,566 CAD
Brilliant Earth$2,276 CAD

43 data points across 13 retailers

19 retailers$314 CAD to $2,276 CAD

A
Cheapest Retailer
-
$314 CAD
A
Retailer 2
-
$351 CAD
View
Final sale: no returns
A
Retailer 3
-
$365 CAD
View
A
Retailer 4
-
$388 CAD
View
Retailer 5
-
$388 CAD
View
Price last confirmed 21 days ago
A
Retailer 6
-
$429 CAD
View
B+
Retailer 7
-
$524 CAD
View
A
Retailer 8
-
$647 CAD
View
A
Retailer 9
-
$651 CAD
View
A
Retailer 10
-
$715 CAD
View
B+
Retailer 11
-
$744 CAD
View
Retailer 12
-
$1,137 CAD
View
Price last confirmed 58 days ago
B
Retailer 13
-
$1,250 CAD
View
B
Retailer 14
-
$1,254 CAD
View
B
Retailer 15
-
$1,258 CAD
View
B
Retailer 16
-
$1,323 CAD
View
Retailer 17
-
$1,566 CAD
View
Price last confirmed 8 days ago
B
Retailer 18
-
$1,776 CAD
View
Most Expensive
B
Brilliant Earth
18623571A · Nov 5
$2,276 CAD
$1,630 USD
View
18 more retailers have this diamond
Prices start from $314 CADSave up to $1,962 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
1.55ct Round
$314 CAD