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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 $686 CAD
$490 USD
As of October 27, 2026
Save $5,570 CAD (89%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $6,256 CAD at Brilliant Earth · As of October 28, 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 27, 2026, with prices from $686 to $6,256, a $5,570 spread on the same certified stone. Brilliant Earth lists it at $6,256. 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
Color
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 27
Current: $6,256 CAD|Low: $658 CAD|High: $6,452 CAD|Avg: $1,940 CAD|-3.0%
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 29, 2026
Retailer 6$686 CAD
Retailer 7$766 CAD
Retailer 11$768 CAD
Retailer 8$850 CAD
Retailer 12$850 CAD
Retailer 20$880 CAD
Retailer 17$1,043 CAD
Retailer 16$1,141 CAD
Retailer 13$1,243 CAD
Retailer 9$1,290 CAD
Retailer 14$1,292 CAD
Retailer 2$1,413 CAD
Retailer 15$1,461 CAD
Retailer 21$1,976 CAD
Retailer 18$1,995 CAD
Retailer 10$2,237 CAD
Retailer 3$2,965 CAD
Retailer 5$3,180 CAD
Retailer 19$3,567 CAD
Retailer 4$3,993 CAD
Brilliant Earth$6,256 CAD

38 data points across 21 retailers

25 retailers$686 CAD to $6,256 CAD

A
Cheapest Retailer
-
$686 CAD
$490 USD
A
Retailer 2
-
$766 CAD
$547 USD
View
Final sale: no returns
A
Retailer 3
-
$768 CAD
$549 USD
View
A
Retailer 4
-
$850 CAD
$607 USD
View
Price last confirmed 13 days ago
A
Retailer 5
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$850 CAD
$607 USD
View
A
Retailer 6
-
$880 CAD
£495 GBP
View
Price last confirmed 12 days ago
A
Retailer 7
-
$1,043 CAD
$745 USD
View
A
Retailer 8
-
$1,141 CAD
$815 USD
View
A
Retailer 9
-
$1,243 CAD
€846 EUR
View
A
Retailer 10
-
$1,290 CAD
A$1,418 AUD
View
A
Retailer 11
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$1,292 CAD
$923 USD
View
A
Retailer 12
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$1,413 CAD
£795 GBP
View
A
Retailer 13
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$1,461 CAD
ZAR 16,866 ZAR
View
A
Retailer 14
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$1,849 CAD
$1,321 USD
View
A
Retailer 15
-
$1,884 CAD
$1,346 USD
View
A
Retailer 16
-
$1,976 CAD
$1,412 USD
View
A
Retailer 17
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$1,995 CAD
A$2,193 AUD
View
Price last confirmed 9 days ago
A
Retailer 18
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$2,237 CAD
$1,598 USD
View
B+
Retailer 19
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$2,772 CAD
$1,980 USD
View
B+
Retailer 20
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$2,965 CAD
$2,119 USD
View
B+
Retailer 21
-
$3,180 CAD
$2,272 USD
View
B+
Retailer 22
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$3,567 CAD
£2,007 GBP
View
B+
Retailer 23
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$3,710 CAD
$2,651 USD
View
B+
Retailer 24
-
$3,993 CAD
A$4,389 AUD
View
Price last confirmed 21 days ago
Most Expensive
B
Brilliant Earth
21063499A · Oct 28
$6,256 CAD
$4,470 USD
View
24 more retailers have this diamond
Prices start from $686 CADSave up to $5,570 CAD

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
$686 CAD