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Marquise|Lab Grown|IGI

3.78ct E VVS1 Marquise Lab Grown Diamond

EX • E/VVS1 • IGI LG806630274

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG806630274

Diamond specifications and retailer prices

From $1,416 AUD
$995 USD
As of October 30, 2026
Save $10,755 AUD (88%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $12,172 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 LG806630274 or 806630274. Listed at 19 retailers as of October 30, 2026, with prices from $1,416 to $12,172, a $10,755 spread on the same certified stone. Brilliant Earth lists it at $12,172. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG806630274
Dimensions15.71 × 8.02 × 5.10 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
15.71 mm8.02 mm3.78 ctE / VVS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG806630274
Side View
Table 62.0%Crown 38°Girdle: MED-THKPavilion 40.1°Culet: NoneDepth 63.6%

Caratlytics Score

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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 30
Current: $12,172 AUD|Low: $1,416 AUD|High: $12,172 AUD|Avg: $3,542 AUD
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
October 31, 2026
Retailer 14$1,416 AUD
Retailer 5$1,715 AUD
Retailer 12$2,007 AUD
Retailer 13$2,104 AUD
Retailer 2$2,246 AUD
Retailer 4$2,704 AUD
Retailer 11$3,267 AUD
Retailer 8$3,378 AUD
Retailer 6$3,411 AUD
Retailer 16$3,906 AUD
Retailer 9$4,057 AUD
Retailer 7$5,051 AUD
Retailer 3$5,101 AUD
Retailer 15$5,280 AUD
Retailer 10$5,730 AUD
Brilliant Earth$12,172 AUD

18 data points across 16 retailers

19 retailers$1,416 AUD to $12,172 AUD

A
Cheapest Retailer
-
$1,416 AUD
$995 USD
Final sale: no returns
A
Retailer 2
-
$1,715 AUD
$1,205 USD
View
A
Retailer 3
-
$2,007 AUD
$1,410 USD
View
A
Retailer 4
-
$2,104 AUD
$1,478 USD
View
A
Retailer 5
-
$2,246 AUD
£1,242 GBP
View
A
Retailer 6
-
$2,704 AUD
€1,809 EUR
View
B+
Retailer 7
-
$3,267 AUD
$2,295 USD
View
Retailer 8
-
$3,378 AUD
View
Price last confirmed 9 days ago
B+
Retailer 9
-
$3,411 AUD
ZAR 38,705 ZAR
View
B+
Retailer 10
-
$3,906 AUD
$2,744 USD
View
B+
Retailer 11
-
$4,057 AUD
£2,244 GBP
View
B
Retailer 12
-
$4,832 AUD
$3,394 USD
View
B+
Retailer 13
-
$5,051 AUD
£2,794 GBP
View
B+
Retailer 14
-
$5,101 AUD
$3,583 USD
View
B+
Retailer 15
-
$5,280 AUD
$3,709 USD
View
B
Retailer 16
-
$5,730 AUD
SGD 5,439 SGD
View
Retailer 17
-
$6,575 AUD
View
Price last confirmed 22 days ago
Retailer 18
-
$8,186 AUD
$5,750 USD
View
Price last confirmed 24 days ago
Most Expensive
B
Brilliant Earth
20403422A · Oct 30
$12,172 AUD
$8,550 USD
View
18 more retailers have this diamond
Prices start from $1,416 AUDSave up to $10,755 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
$1,416 AUD