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Round|Lab Grown|IGI

1.20ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG517200392

Shape and cutting style on the report: Round brilliant

Certificate IGI LG517200392

Diamond specifications and retailer prices

From $612 CAD
$437 USD
As of October 30, 2026
Save $1,566 CAD (72%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,661 CAD at MOH London · As of October 29, 2026
View at MOH London

About this 1.2ct lab-grown round diamond

This 1.2ct lab-grown round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG517200392 or 517200392. Listed at 13 retailers as of October 24, 2026, with a 256% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.20
Carat
D
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG517200392
Dimensions6.74 × 6.70 × 4.23 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
6.74 mm6.70 mm1.20 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG517200392
Side View
Table 59.5%Crown 36.1°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 62.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $2,661 CAD|Low: $437 CAD|High: $2,679 CAD|Avg: $1,042 CAD|+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 11$546 CAD
Retailer 3$612 CAD
Retailer 14$612 CAD
Retailer 6$630 CAD
Retailer 5$677 CAD
Retailer 12$677 CAD
Retailer 8$833 CAD
Retailer 10$882 CAD
Retailer 7$1,042 CAD
Retailer 13$1,075 CAD
Retailer 2$1,107 CAD
Retailer 9$1,901 CAD
Retailer 4$2,178 CAD
MOH London$2,661 CAD

44 data points across 14 retailers

13 retailers$612 CAD to $2,178 CAD

Retailer 1
-
$546 CAD
$390 USD
Price last confirmed 7 days ago
B+
Retailer 2
-
$612 CAD
$437 USD
View
Final sale: no returns
B+
Retailer 3
-
$612 CAD
$437 USD
View
B+
Retailer 4
-
$630 CAD
$450 USD
View
B+
Retailer 5
-
$677 CAD
$484 USD
View
Retailer 6
-
$833 CAD
$595 USD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$882 CAD
$630 USD
View
B
Retailer 8
-
$1,042 CAD
€709 EUR
View
B
Retailer 9
-
$1,075 CAD
$768 USD
View
B
Retailer 10
-
$1,107 CAD
£623 GBP
View
B
Retailer 11
-
$1,901 CAD
$1,358 USD
View
B
Retailer 12
-
$2,178 CAD
$1,556 USD
View
Most Expensive
MOH London
LG517200392 · Oct 29
$2,661 CAD
£1,497 GBP
View
Price under review
12 more retailers have this diamond
Prices start from $612 CADSave up to $1,566 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.

B+
1.20ct Round
$612 CAD