CaratHunter
Plans
Marquise|Lab Grown|IGI

4.05ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG817696109

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG817696109

Diamond specifications and retailer prices

From $5,114 AUD
$3,592 USD
As of October 31, 2026
Save $14,536 AUD (74%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $21,416 AUD at Novita Diamonds · As of October 8, 2026
View at Novita Diamonds

About this 4.05ct lab-grown marquise diamond

This 4.05ct 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 LG817696109 or 817696109. Listed at 17 retailers as of October 31, 2026, with a 284% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

4.05
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.8°
Pavilion angle38.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG817696109
Dimensions16.31 × 8.38 × 5.01 mm
L/W Ratio1.95
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.31 mm8.38 mm4.05 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG817696109
Side View
Table 60.0%Crown 37.8°Girdle: MED-STKPavilion 38.8°Culet: NoneDepth 59.8%

Caratlytics Score

How it works →
A+
Exceptional
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: $5,114 AUD|Low: $5,114 AUD|High: $20,212 AUD|Avg: $10,646 AUD|-3.3%
Retailer 1
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
October 31, 2026
Retailer 1$5,114 AUD
Retailer 12$5,339 AUD
Retailer 3$5,545 AUD
Retailer 9$7,044 AUD
Retailer 11$7,490 AUD
Retailer 7$7,702 AUD
Retailer 15$8,283 AUD
Retailer 4$9,221 AUD
Retailer 2$9,728 AUD
Retailer 16$11,325 AUD
Retailer 8$11,622 AUD
Retailer 6$12,740 AUD
Retailer 5$13,562 AUD
Retailer 10$17,852 AUD
Retailer 14$18,614 AUD
Retailer 13$19,650 AUD

17 data points across 16 retailers

17 retailers$5,114 AUD to $19,650 AUD

A+
Cheapest Retailer
-
$5,114 AUD
$3,592 USD
Final sale: no returns
A
Retailer 2
-
$5,339 AUD
$3,750 USD
View
A
Retailer 3
-
$5,545 AUD
$3,895 USD
View
A
Retailer 4
-
$7,044 AUD
£3,896 GBP
View
A
Retailer 5
-
$7,490 AUD
$5,261 USD
View
A
Retailer 6
-
$7,702 AUD
$5,410 USD
View
A
Retailer 7
-
$8,283 AUD
$5,818 USD
View
A
Retailer 8
-
$9,221 AUD
£5,100 GBP
View
A
Retailer 9
-
$9,728 AUD
€6,508 EUR
View
A
Retailer 10
-
$11,325 AUD
ZAR 128,519 ZAR
View
Retailer 11
-
$11,622 AUD
View
Price last confirmed 9 days ago
A
Retailer 12
-
$12,740 AUD
$8,949 USD
View
A
Retailer 13
-
$13,562 AUD
£7,501 GBP
View
B+
Retailer 14
-
$17,852 AUD
SGD 16,946 SGD
View
B+
Retailer 15
-
$18,614 AUD
$13,075 USD
View
B+
Retailer 16
-
$19,650 AUD
$13,803 USD
View
Most Expensive
Novita Diamonds
cert_817696109 · Oct 8
$21,416 AUD
View
Price last confirmed 23 days ago
16 more retailers have this diamond
Prices start from $5,114 AUDSave up to $14,536 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+
4.05ct Marquise
$5,114 AUD