CaratHunter
Plans
Marquise|Lab Grown|IGI

3.78ct G VS1 Marquise Lab Grown Diamond

EX • G/VS1 • IGI LG813604687

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG813604687

Diamond specifications and retailer prices

From €451 EUR
$504 USD
As of November 3, 2026
Save €2,716 EUR (86%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: €3,167 EUR at Brilliant Earth · As of November 1, 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 G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG813604687 or 813604687. Listed at 4 retailers as of November 1, 2026, with prices from €451 to €3,167, a €2,716 spread on the same certified stone. Brilliant Earth lists it at €3,167. 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
G
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG813604687
Dimensions16.72 × 8.11 × 4.98 mm
L/W Ratio2.06
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.72 mm8.11 mm3.78 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG813604687
Side View
Table 61.0%Crown 35°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 61.4%

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: Nov 3
Current: €3,167 EUR|Low: €445 EUR|High: €3,265 EUR|Avg: €2,028 EUR|-3.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
November 3, 2026
Retailer 3€451 EUR
Retailer 2€847 EUR
Retailer 4€2,836 EUR
Brilliant Earth€3,167 EUR

38 data points across 4 retailers

4 retailers€451 EUR to €3,167 EUR

A
Cheapest Retailer
-
€451 EUR
$504 USD
Final sale: no returns
A
Retailer 2
-
€847 EUR
£746 GBP
View
Retailer 3
-
€2,836 EUR
$3,170 USD
View
Price last confirmed 16 days ago
Most Expensive
B
Brilliant Earth
21263694A · Nov 1
€3,167 EUR
$3,540 USD
View
3 more retailers have this diamond
Prices start from €451 EURSave up to €2,716 EUR

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
€451 EUR