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Round|Lab Grown|IGI

4.20ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG754594373

Shape and cutting style on the report: Round brilliant

Certificate IGI LG754594373

Diamond specifications and retailer prices

From $2,665 CAD
$1,908 USD
As of October 29, 2026
Save $15,788 CAD (86%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $18,453 CAD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 4.2ct lab-grown round diamond

This 4.2ct lab-grown round sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG754594373 or 754594373. Listed at 17 retailers as of October 29, 2026, with prices from $2,665 to $18,453, a $15,788 spread on the same certified stone. Brilliant Earth lists it at $18,453. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

4.20
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754594373
Dimensions10.35 × 10.39 × 6.37 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
HEARTS & ARROWS 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
10.35 mm10.39 mm4.20 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754594373
Side View
Table 56.0%Crown 34.3°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.4%

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: $18,453 CAD|Low: $2,665 CAD|High: $33,945 CAD|Avg: $8,698 CAD|-45.6%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
October 30, 2026
Retailer 14$2,665 CAD
Retailer 4$2,900 CAD
Retailer 15$3,228 CAD
Retailer 9$3,353 CAD
Retailer 12$4,009 CAD
Retailer 3$4,691 CAD
Retailer 13$4,842 CAD
Retailer 17$5,076 CAD
Retailer 8$5,128 CAD
Retailer 10$5,511 CAD
Retailer 5$7,124 CAD
Retailer 6$7,487 CAD
Retailer 11$8,549 CAD
Retailer 2$9,309 CAD
Retailer 7$15,102 CAD
Retailer 16$18,341 CAD
Brilliant Earth$18,453 CAD

34 data points across 17 retailers

17 retailers$2,665 CAD to $18,453 CAD

A
Cheapest Retailer
-
$2,665 CAD
$1,908 USD
A
Retailer 2
-
$2,900 CAD
$2,076 USD
View
A
Retailer 3
-
$3,228 CAD
$2,311 USD
View
A
Retailer 4
-
$3,353 CAD
$2,400 USD
View
Final sale: no returns
A
Retailer 5
-
$4,009 CAD
$2,870 USD
View
A
Retailer 6
-
$4,691 CAD
$3,358 USD
View
A
Retailer 7
-
$4,842 CAD
$3,466 USD
View
A
Retailer 8
-
$5,076 CAD
$3,634 USD
View
A
Retailer 9
-
$5,128 CAD
$3,671 USD
View
A
Retailer 10
-
$5,511 CAD
€3,757 EUR
View
A
Retailer 11
-
$7,124 CAD
$5,100 USD
View
Retailer 12
-
$7,487 CAD
A$8,246 AUD
View
Price last confirmed 8 days ago
A
Retailer 13
-
$8,549 CAD
$6,120 USD
View
B+
Retailer 14
-
$9,309 CAD
£5,247 GBP
View
Retailer 15
-
$15,102 CAD
A$16,632 AUD
View
Price last confirmed 21 days ago
B
Retailer 16
-
$18,341 CAD
$13,130 USD
View
Most Expensive
B
Brilliant Earth
17680491Y · Oct 30
$18,453 CAD
$13,210 USD
View
16 more retailers have this diamond
Prices start from $2,665 CADSave up to $15,788 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
4.20ct Round
$2,665 CAD