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Marquise|Lab Grown|IGI

1.70ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG818668458

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG818668458

Diamond specifications and retailer prices

From $698 AUD
$490 USD
As of October 30, 2026
Save $4,456 AUD (86%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $5,153 AUD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.7ct lab-grown marquise diamond

This 1.7ct lab-grown marquise sits in the one-and-a-half to two carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818668458 or 818668458. Listed at 25 retailers as of October 30, 2026, with prices from $698 to $5,153, a $4,456 spread on the same certified stone. Brilliant Earth lists it at $5,153. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.70
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818668458
Dimensions12.57 × 6.12 × 3.83 mm
L/W Ratio2.05
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.57 mm6.12 mm1.70 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818668458
Side View
Table 61.0%Crown 35.1°Girdle: MED-STKPavilion 39.5°Culet: NoneDepth 62.6%

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: $5,153 AUD|Low: $669 AUD|High: $6,563 AUD|Avg: $1,966 AUD|-21.5%
Brilliant Earth
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
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
October 30, 2026
Retailer 6$698 AUD
Retailer 7$779 AUD
Retailer 11$782 AUD
Retailer 8$864 AUD
Retailer 12$864 AUD
Retailer 20$895 AUD
Retailer 18$1,061 AUD
Retailer 16$1,265 AUD
Retailer 9$1,312 AUD
Retailer 14$1,314 AUD
Retailer 2$1,347 AUD
Retailer 15$1,438 AUD
Retailer 17$1,486 AUD
Retailer 21$2,010 AUD
Retailer 13$2,014 AUD
Retailer 10$2,275 AUD
Retailer 3$3,016 AUD
Retailer 5$3,234 AUD
Retailer 19$3,629 AUD
Retailer 4$4,061 AUD
Brilliant Earth$5,153 AUD

38 data points across 21 retailers

25 retailers$698 AUD to $5,153 AUD

A
Cheapest Retailer
-
$698 AUD
$490 USD
A
Retailer 2
-
$779 AUD
$547 USD
View
Final sale: no returns
A
Retailer 3
-
$782 AUD
$549 USD
View
Retailer 4
-
$864 AUD
$607 USD
View
Price last confirmed 14 days ago
A
Retailer 5
-
$864 AUD
$607 USD
View
Retailer 6
-
$895 AUD
£495 GBP
View
Price last confirmed 13 days ago
A
Retailer 7
-
$1,061 AUD
$745 USD
View
A
Retailer 8
-
$1,265 AUD
€846 EUR
View
A
Retailer 9
-
$1,312 AUD
View
A
Retailer 10
-
$1,314 AUD
$923 USD
View
A
Retailer 11
-
$1,347 AUD
$946 USD
View
A
Retailer 12
-
$1,438 AUD
£795 GBP
View
A
Retailer 13
-
$1,486 AUD
ZAR 16,866 ZAR
View
A
Retailer 14
-
$1,881 AUD
$1,321 USD
View
A
Retailer 15
-
$1,917 AUD
$1,346 USD
View
A
Retailer 16
-
$2,010 AUD
$1,412 USD
View
A
Retailer 17
-
$2,014 AUD
View
A
Retailer 18
-
$2,275 AUD
$1,598 USD
View
B+
Retailer 19
-
$2,819 AUD
$1,980 USD
View
B+
Retailer 20
-
$3,016 AUD
$2,119 USD
View
B+
Retailer 21
-
$3,234 AUD
$2,272 USD
View
B+
Retailer 22
-
$3,629 AUD
£2,007 GBP
View
B+
Retailer 23
-
$3,774 AUD
$2,651 USD
View
Retailer 24
-
$4,061 AUD
View
Price last confirmed 22 days ago
Most Expensive
B
Brilliant Earth
21063499A · Oct 30
$5,153 AUD
$3,620 USD
View
24 more retailers have this diamond
Prices start from $698 AUDSave up to $4,456 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
1.70ct Marquise
$698 AUD