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Marquise|Lab Grown|IGI

0.71ct E SI1 Marquise Lab Grown Diamond

ID • E/SI1 • IGI LG803661811

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG803661811

Diamond specifications and retailer prices

From $205 AUD
$144 USD
As of October 27, 2026
Save $532 AUD (72%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,924 AUD at MOH London · As of October 21, 2026
View at MOH London

About this 0.71ct lab-grown marquise diamond

This 0.71ct lab-grown marquise sits in the half to three-quarter carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG803661811 or 803661811. Listed at 16 retailers as of October 25, 2026, with a 260% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

0.71
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle34.4°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG803661811
Dimensions8.98 × 4.67 × 2.96 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
8.98 mm4.67 mm0.71 ctE / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG803661811
Side View
Table 62.0%Crown 34.4°Girdle: STK-THKPavilion 41.5°Culet: NoneDepth 63.4%

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 27
Current: $1,924 AUD|Low: $178 AUD|High: $1,953 AUD|Avg: $523 AUD|-0.3%
MOH London
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 30, 2026
Retailer 16$185 AUD
Retailer 5$205 AUD
Retailer 15$215 AUD
Retailer 7$229 AUD
Retailer 12$242 AUD
Retailer 3$255 AUD
Retailer 10$382 AUD
Retailer 9$399 AUD
Retailer 14$436 AUD
Retailer 6$564 AUD
Retailer 11$565 AUD
Retailer 13$567 AUD
Retailer 2$598 AUD
Retailer 8$634 AUD
Retailer 4$737 AUD
MOH London$1,924 AUD

43 data points across 16 retailers

16 retailers$205 AUD to $737 AUD

Retailer 1
-
$185 AUD
$130 USD
Price last confirmed 7 days ago
A
Retailer 2
-
$205 AUD
$144 USD
View
Final sale: no returns
A
Retailer 3
-
$215 AUD
$151 USD
View
A
Retailer 4
-
$229 AUD
$161 USD
View
A
Retailer 5
-
$242 AUD
$170 USD
View
A
Retailer 6
-
$255 AUD
HK$1,400 HKD
View
A
Retailer 7
-
$382 AUD
£211 GBP
View
A
Retailer 8
-
$399 AUD
€267 EUR
View
B+
Retailer 9
-
$436 AUD
$306 USD
View
B+
Retailer 10
-
$564 AUD
$396 USD
View
B+
Retailer 11
-
$565 AUD
£312 GBP
View
B+
Retailer 12
-
$567 AUD
$398 USD
View
B+
Retailer 13
-
$598 AUD
$420 USD
View
B
Retailer 14
-
$634 AUD
SGD 602 SGD
View
B
Retailer 15
-
$737 AUD
$518 USD
View
Most Expensive
MOH London
LG803661811 · Oct 21
$1,924 AUD
£1,064 GBP
View
Price last confirmed 9 days ago
15 more retailers have this diamond
Prices start from $205 AUDSave up to $532 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
0.71ct Marquise
$205 AUD