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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 $628 SGD
$490 USD
As of October 30, 2026
Save $5,101 SGD (89%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $5,729 SGD 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 28, 2026, with prices from $628 to $5,729, a $5,101 spread on the same certified stone. Brilliant Earth lists it at $5,729. 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

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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: $5,729 SGD|Low: $602 SGD|High: $5,909 SGD|Avg: $1,770 SGD|-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 30, 2026
Retailer 6$628 SGD
Retailer 7$701 SGD
Retailer 11$704 SGD
Retailer 8$778 SGD
Retailer 12$778 SGD
Retailer 20$806 SGD
Retailer 18$955 SGD
Retailer 16$1,139 SGD
Retailer 9$1,181 SGD
Retailer 14$1,183 SGD
Retailer 2$1,212 SGD
Retailer 15$1,294 SGD
Retailer 17$1,338 SGD
Retailer 21$1,810 SGD
Retailer 13$1,813 SGD
Retailer 10$2,048 SGD
Retailer 3$2,716 SGD
Retailer 5$2,912 SGD
Retailer 19$3,267 SGD
Retailer 4$3,656 SGD
Brilliant Earth$5,729 SGD

38 data points across 21 retailers

25 retailers$628 SGD to $5,729 SGD

A
Cheapest Retailer
-
$628 SGD
$490 USD
A
Retailer 2
-
$701 SGD
$547 USD
View
Final sale: no returns
A
Retailer 3
-
$704 SGD
$549 USD
View
Retailer 4
-
$778 SGD
$607 USD
View
Price last confirmed 14 days ago
A
Retailer 5
-
$778 SGD
$607 USD
View
Retailer 6
-
$806 SGD
£495 GBP
View
Price last confirmed 13 days ago
A
Retailer 7
-
$955 SGD
$745 USD
View
A
Retailer 8
-
$1,139 SGD
€846 EUR
View
A
Retailer 9
-
$1,181 SGD
A$1,418 AUD
View
A
Retailer 10
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$1,183 SGD
$923 USD
View
A
Retailer 11
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$1,212 SGD
$946 USD
View
A
Retailer 12
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$1,294 SGD
£795 GBP
View
A
Retailer 13
-
$1,338 SGD
ZAR 16,866 ZAR
View
A
Retailer 14
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$1,693 SGD
$1,321 USD
View
A
Retailer 15
-
$1,726 SGD
$1,346 USD
View
A
Retailer 16
-
$1,810 SGD
$1,412 USD
View
A
Retailer 17
-
$1,813 SGD
A$2,176 AUD
View
A
Retailer 18
-
$2,048 SGD
$1,598 USD
View
B+
Retailer 19
-
$2,538 SGD
$1,980 USD
View
B+
Retailer 20
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$2,716 SGD
$2,119 USD
View
B+
Retailer 21
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$2,912 SGD
$2,272 USD
View
B+
Retailer 22
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$3,267 SGD
£2,007 GBP
View
B+
Retailer 23
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$3,398 SGD
$2,651 USD
View
Retailer 24
-
$3,656 SGD
A$4,389 AUD
View
Price last confirmed 21 days ago
Most Expensive
B
Brilliant Earth
21063499A · Oct 28
$5,729 SGD
$4,470 USD
View
24 more retailers have this diamond
Prices start from $628 SGDSave up to $5,101 SGD

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
$628 SGD