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Marquise|Lab Grown|IGI

3.78ct E VVS1 Marquise Lab Grown Diamond

ID • E/VVS1 • IGI LG846643459

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG846643459

Diamond specifications and retailer prices

From $1,320 AUD
$927 USD
As of October 27, 2026
Save $6,980 AUD (84%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $8,300 AUD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 3.78ct lab-grown marquise diamond

This 3.78ct lab-grown marquise sits in the three to five carat band, graded E colour (colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG846643459 or 846643459. Listed at 22 retailers as of October 27, 2026, with prices from $1,320 to $8,300, a $6,980 spread on the same certified stone. Brilliant Earth lists it at $8,300. 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

3.78
Carat
E
Colour
VVS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846643459
Dimensions15.75 × 8.05 × 5.14 mm
L/W Ratio1.96
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
15.75 mm8.05 mm3.78 ctE / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846643459
Side View
Table 60.0%Crown 36.4°Girdle: STK-THKPavilion 41.4°Culet: NoneDepth 63.9%

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 27
Current: $8,300 AUD|Low: $1,320 AUD|High: $8,300 AUD|Avg: $3,349 AUD
Brilliant Earth
Retailer 2
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Retailer 5
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Retailer 22
October 31, 2026
Retailer 10$1,320 AUD
Retailer 14$1,458 AUD
Retailer 22$1,478 AUD
Retailer 11$1,553 AUD
Retailer 18$1,770 AUD
Retailer 8$1,780 AUD
Retailer 16$2,056 AUD
Retailer 17$2,178 AUD
Retailer 9$2,321 AUD
Retailer 19$2,337 AUD
Retailer 2$3,382 AUD
Retailer 3$3,553 AUD
Retailer 15$3,601 AUD
Retailer 13$3,921 AUD
Retailer 4$4,231 AUD
Retailer 12$4,369 AUD
Retailer 6$4,544 AUD
Retailer 20$5,108 AUD
Retailer 5$5,218 AUD
Retailer 21$5,287 AUD
Retailer 7$5,506 AUD
Brilliant Earth$8,300 AUD

12 data points across 22 retailers

22 retailers$1,320 AUD to $8,300 AUD

A
Cheapest Retailer
-
$1,320 AUD
$927 USD
A
Retailer 2
-
$1,458 AUD
$1,024 USD
View
A
Retailer 3
-
$1,478 AUD
$1,038 USD
View
Final sale: no returns
A
Retailer 4
-
$1,553 AUD
$1,091 USD
View
A
Retailer 5
-
$1,770 AUD
£979 GBP
View
A
Retailer 6
-
$1,780 AUD
$1,250 USD
View
A
Retailer 7
-
$2,056 AUD
$1,444 USD
View
A
Retailer 8
-
$2,178 AUD
$1,530 USD
View
A
Retailer 9
-
$2,321 AUD
€1,553 EUR
View
A
Retailer 10
-
$2,337 AUD
£1,293 GBP
View
B+
Retailer 11
-
$3,382 AUD
$2,376 USD
View
B+
Retailer 12
-
$3,553 AUD
ZAR 40,318 ZAR
View
Retailer 13
-
$3,601 AUD
View
Price last confirmed 9 days ago
B+
Retailer 14
-
$3,921 AUD
$2,754 USD
View
B+
Retailer 15
-
$4,231 AUD
£2,340 GBP
View
B+
Retailer 16
-
$4,369 AUD
$3,069 USD
View
B+
Retailer 17
-
$4,544 AUD
$3,192 USD
View
B+
Retailer 18
-
$5,108 AUD
SGD 4,849 SGD
View
B+
Retailer 19
-
$5,218 AUD
£2,886 GBP
View
B+
Retailer 20
-
$5,287 AUD
$3,714 USD
View
B+
Retailer 21
-
$5,506 AUD
$3,868 USD
View
Most Expensive
B
Brilliant Earth
22283113A · Oct 30
$8,300 AUD
$5,830 USD
View
21 more retailers have this diamond
Prices start from $1,320 AUDSave up to $6,980 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
3.78ct Marquise
$1,320 AUD