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Marquise|Lab Grown|IGI

4.20ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG814643393

Shape and cutting style on the report: Hexagonal modified brilliant

Certificate IGI LG814643393

Diamond specifications and retailer prices

From $8,819 AUD
$6,195 USD
As of October 31, 2026
Save $40,025 AUD (82%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $48,844 AUD at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 4.2ct lab-grown marquise diamond

This 4.2ct lab-grown marquise sits in the three to five carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG814643393 or 814643393. Listed at 8 retailers as of October 31, 2026, with prices from $8,819 to $48,844, a $40,025 spread on the same certified stone. Do Amore Diamonds lists it at $48,844. 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
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle37.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG814643393
Dimensions15.41 × 8.04 × 5.44 mm
L/W Ratio1.92
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
15.41 mm8.04 mm4.20 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG814643393
Side View
Table 63.0%Crown 35.3°Girdle: MED-STKPavilion 37.8°Culet: NoneDepth 67.7%

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 31
Current: $48,844 AUD|Low: $3,640 AUD|High: $48,844 AUD|Avg: $14,492 AUD|+149.9%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 4$8,819 AUD
Retailer 8$9,174 AUD
Retailer 9$10,569 AUD
Retailer 5$14,272 AUD
Retailer 3$19,870 AUD
Retailer 6$24,218 AUD
Retailer 2$30,576 AUD
Retailer 7$33,999 AUD
Do Amore Diamonds$48,844 AUD

38 data points across 9 retailers

8 retailers$8,819 AUD to $48,844 AUD

A
Cheapest Retailer
-
$8,819 AUD
$6,195 USD
A
Retailer 2
-
$9,174 AUD
$6,444 USD
View
Final sale: no returns
A
Retailer 3
-
$14,272 AUD
$10,025 USD
View
B+
Retailer 4
-
$19,870 AUD
£10,990 GBP
View
B
Retailer 5
-
$24,218 AUD
$17,012 USD
View
B
Retailer 6
-
$30,576 AUD
£16,912 GBP
View
B
Retailer 7
-
$33,999 AUD
$23,883 USD
View
Most Expensive
B
Do Amore Diamonds
20-E90950 · Oct 31
$48,844 AUD
$34,310 USD
View
7 more retailers have this diamond
Prices start from $8,819 AUDSave up to $40,025 AUD

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 Marquise
$8,819 AUD