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Marquise|Lab Grown|IGI

4.00ct F SI1 Marquise Lab Grown Diamond

ID • F/SI1 • IGI LG778629621

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG778629621

Diamond specifications and retailer prices

From $1,070 AUD
$750 USD
As of November 1, 2026
Save $2,568 AUD (71%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $3,639 AUD at Rare Carat · As of November 1, 2026
View at Rare Carat

About this 4ct lab-grown marquise diamond

This 4ct lab-grown marquise sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG778629621 or 778629621. Listed at 6 retailers as of November 1, 2026, with prices from $1,070 to $3,639, a $2,568 spread on the same certified stone. Rare Carat lists it at $3,639. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

4.00
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle33.8°
Pavilion angle39°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778629621
Dimensions15.95 × 8.30 × 5.00 mm
L/W Ratio1.92
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
15.95 mm8.30 mm4.00 ctF / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778629621
Side View
Table 64.0%Crown 33.8°Girdle: MED-STKPavilion 39°Culet: NoneDepth 60.2%

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 1
Current: $1,319 AUD|Low: $1,070 AUD|High: $2,965 AUD|Avg: $1,660 AUD|+2.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 3, 2026
Retailer 3$1,070 AUD
Retailer 1$1,319 AUD
Retailer 4$1,386 AUD
Retailer 5$1,602 AUD
Retailer 2$2,945 AUD

39 data points across 5 retailers

6 retailers$1,070 AUD to $3,639 AUD

B+
Cheapest Retailer
-
$1,070 AUD
$750 USD
A
Retailer 2
-
$1,319 AUD
£728 GBP
View
A
Retailer 3
-
$1,386 AUD
$971 USD
View
B+
Retailer 4
-
$1,602 AUD
$1,123 USD
View
B
Retailer 5
-
$2,945 AUD
£1,625 GBP
View
Most Expensive
B
Rare Carat
BS30-18_l_778629621 · Nov 1
$3,639 AUD
$2,550 USD
View
5 more retailers have this diamond
Prices start from $1,070 AUDSave up to $2,568 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
4.00ct Marquise
$1,070 AUD