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Marquise|Lab Grown|IGI

2.80ct E SI1 Marquise Lab Grown Diamond

EX • E/SI1 • IGI LG778698703

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG778698703

Diamond specifications and retailer prices

From $487 AUD
$342 USD
As of October 30, 2026
Save $2,880 AUD (86%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $3,367 AUD at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 2.8ct lab-grown marquise diamond

This 2.8ct lab-grown marquise sits in the two to three carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG778698703 or 778698703. Listed at 14 retailers as of October 28, 2026, with prices from $487 to $3,367, a $2,880 spread on the same certified stone. Rare Carat lists it at $3,367. 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

2.80
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778698703
Dimensions14.60 × 7.29 × 4.66 mm
L/W Ratio2.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
14.60 mm7.29 mm2.80 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778698703
Side View
Table 58.0%Crown 36.1°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 63.9%

Caratlytics Score

How it works →
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: $3,367 AUD|Low: $487 AUD|High: $3,367 AUD|Avg: $1,293 AUD
Rare Carat
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
October 31, 2026
Retailer 8$487 AUD
Retailer 6$565 AUD
Retailer 11$604 AUD
Retailer 15$674 AUD
Retailer 9$758 AUD
Retailer 12$819 AUD
Retailer 5$971 AUD
Retailer 14$1,041 AUD
Retailer 10$1,083 AUD
Retailer 4$1,378 AUD
Retailer 7$1,392 AUD
Retailer 2$1,770 AUD
Retailer 3$1,940 AUD
Retailer 13$2,432 AUD
Rare Carat$3,367 AUD

4 data points across 15 retailers

14 retailers$487 AUD to $3,367 AUD

A
Cheapest Retailer
-
$487 AUD
$342 USD
A
Retailer 2
-
$565 AUD
$397 USD
View
A
Retailer 3
-
$604 AUD
$424 USD
View
A
Retailer 4
-
$674 AUD
HK$3,700 HKD
View
A
Retailer 5
-
$758 AUD
£419 GBP
View
A
Retailer 6
-
$819 AUD
$575 USD
View
B+
Retailer 7
-
$971 AUD
$682 USD
View
A
Retailer 8
-
$1,041 AUD
$731 USD
View
A
Retailer 9
-
$1,083 AUD
£599 GBP
View
B+
Retailer 10
-
$1,378 AUD
$968 USD
View
B+
Retailer 11
-
$1,770 AUD
$1,243 USD
View
B+
Retailer 12
-
$1,940 AUD
$1,363 USD
View
B
Retailer 13
-
$2,432 AUD
£1,345 GBP
View
Most Expensive
B
Rare Carat
KI7036987KF778 · Oct 28
$3,367 AUD
$2,365 USD
View
13 more retailers have this diamond
Prices start from $487 AUDSave up to $2,880 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
2.80ct Marquise
$487 AUD