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Marquise|Lab Grown|IGI

1.80ct E SI1 Marquise Lab Grown Diamond

EX • E/SI1 • IGI LG761514334

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG761514334

Diamond specifications and retailer prices

From $662 AUD
$464 USD
As of November 1, 2026
Save $1,050 AUD (61%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $1,712 AUD at Rare Carat · As of November 1, 2026
View at Rare Carat

About this 1.8ct lab-grown marquise diamond

This 1.8ct lab-grown marquise sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG761514334 or 761514334. Listed at 6 retailers as of November 1, 2026, with prices from $662 to $1,712, a $1,050 spread on the same certified stone. Rare Carat lists it at $1,712. 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

1.80
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG761514334
Dimensions11.98 × 6.31 × 4.09 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.98 mm6.31 mm1.80 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG761514334
Side View
Table 59.0%Crown 34°Girdle: STK-THKPavilion 41°Culet: NoneDepth 64.8%

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: $710 AUD|Low: $626 AUD|High: $1,566 AUD|Avg: $908 AUD|+3.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 3, 2026
Retailer 3$662 AUD
Retailer 1$710 AUD
Retailer 4$765 AUD
Retailer 5$880 AUD
Retailer 2$1,548 AUD

41 data points across 5 retailers

6 retailers$662 AUD to $1,712 AUD

B+
Cheapest Retailer
-
$662 AUD
$464 USD
A
Retailer 2
-
$710 AUD
£392 GBP
View
A
Retailer 3
-
$765 AUD
$536 USD
View
B+
Retailer 4
-
$880 AUD
$617 USD
View
B
Retailer 5
-
$1,548 AUD
£854 GBP
View
Most Expensive
B
Rare Carat
756-25A_l_761514334 · Nov 1
$1,712 AUD
$1,200 USD
View
5 more retailers have this diamond
Prices start from $662 AUDSave up to $1,050 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
1.80ct Marquise
$662 AUD