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Marquise|Lab Grown|IGI

1.70ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG818668458

Certificate IGI LG818668458

Diamond specifications and retailer prices

From $490 USD
Save $4,120 USD (89%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $4,610 USD at Brilliant Earth
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 17 retailers, with prices from $490 to $4,610 at Brilliant Earth, a $4,120 spread on the same certified stone. 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 →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0-100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Sep 30
Current: $4,610 USD|Low: $490 USD|High: $4,610 USD|Avg: $1,807 USD
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
October 1, 2026
Retailer 11$490 USD
Retailer 14$549 USD
Retailer 3$600 USD
Retailer 17$607 USD
Retailer 4$815 USD
Retailer 5$923 USD
Retailer 13$1,002 USD
Retailer 16$1,022 USD
Retailer 12$1,299 USD
Retailer 7$1,321 USD
Retailer 6$1,346 USD
Retailer 10$1,598 USD
Retailer 8$1,980 USD
Retailer 15$2,567 USD
Retailer 9$2,598 USD
Retailer 2$2,846 USD
Brilliant Earth$4,610 USD

30 data points across 17 retailers

17 retailers$490 USD to $4,610 USD

B+
Cheapest Retailer
-
$490 USD
B+
Retailer 2
-
$549 USD
View
B+
Retailer 3
-
$600 USD
View
B+
Retailer 4
-
$607 USD
View
B+
Retailer 5
-
$815 USD
View
B+
Retailer 6
-
$923 USD
View
B+
Retailer 7
-
$1,004 USD
£791 GBP
View
B+
Retailer 8
-
$1,022 USD
ZAR 16,517 ZAR
View
B+
Retailer 9
-
$1,299 USD
View
B+
Retailer 10
-
$1,321 USD
View
B+
Retailer 11
-
$1,346 USD
View
B+
Retailer 12
-
$1,598 USD
View
B
Retailer 13
-
$1,980 USD
View
B
Retailer 14
-
$2,567 USD
£2,021 GBP
View
B
Retailer 15
-
$2,651 USD
View
B
Retailer 16
-
$2,846 USD
A$4,378 AUD
View
Most Expensive
C
Brilliant Earth
21102411A · Sep 28
$4,610 USD
View
16 more retailers have this diamond
Prices start from $490 USDSave up to $4,120 USD

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.

B+
1.70ct Marquise
$490 USD