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Marquise|Lab Grown|IGI

1.70ct E FL Marquise Lab Grown Diamond

EX • E/FL • IGI LG784645899

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG784645899

Diamond specifications and retailer prices

From £534 GBP
$716 USD
As of October 27, 2026
Save £4,212 GBP (89%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £4,747 GBP at Do Amore Diamonds · As of October 30, 2026
View at Do Amore Diamonds

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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG784645899 or 784645899. Listed at 15 retailers as of October 27, 2026, with prices from £534 to £4,747, a £4,212 spread on the same certified stone. Do Amore Diamonds lists it at £4,747. 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
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.6°
Pavilion angle39.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG784645899
Dimensions11.74 × 6.15 × 3.95 mm
L/W Ratio1.91
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
11.74 mm6.15 mm1.70 ctE / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG784645899
Side View
Table 61.0%Crown 37.6°Girdle: STK-THKPavilion 39.6°Culet: NoneDepth 64.2%

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 27
Current: £4,747 GBP|Low: £534 GBP|High: £6,247 GBP|Avg: £1,705 GBP|-24.0%
Do Amore Diamonds
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
October 29, 2026
Retailer 10£534 GBP
Retailer 15£581 GBP
Retailer 12£737 GBP
Retailer 9£757 GBP
Retailer 4£772 GBP
Retailer 7£796 GBP
Retailer 5£827 GBP
Retailer 11£1,006 GBP
Retailer 2£1,153 GBP
Retailer 13£1,526 GBP
Retailer 14£1,923 GBP
Retailer 3£1,970 GBP
Retailer 8£2,578 GBP
Retailer 6£3,635 GBP
Do Amore Diamonds£4,747 GBP

35 data points across 15 retailers

15 retailers£534 GBP to £4,747 GBP

A
Cheapest Retailer
-
£534 GBP
$716 USD
A
Retailer 2
-
£581 GBP
$779 USD
View
A
Retailer 3
-
£737 GBP
$987 USD
View
A
Retailer 4
-
£757 GBP
View
A
Retailer 5
-
£772 GBP
$1,035 USD
View
A
Retailer 6
-
£796 GBP
$1,066 USD
View
Final sale: no returns
A
Retailer 7
-
£827 GBP
$1,108 USD
View
A
Retailer 8
-
£1,006 GBP
$1,348 USD
View
A
Retailer 9
-
£1,153 GBP
€1,471 EUR
View
B+
Retailer 10
-
£1,526 GBP
$2,045 USD
View
B+
Retailer 11
-
£1,923 GBP
$2,577 USD
View
B+
Retailer 12
-
£1,970 GBP
$2,640 USD
View
B
Retailer 13
-
£2,578 GBP
View
B
Retailer 14
-
£3,635 GBP
$4,870 USD
View
Most Expensive
B
Do Amore Diamonds
27-3887A5746 · Oct 30
£4,747 GBP
$6,360 USD
View
14 more retailers have this diamond
Prices start from £534 GBPSave up to £4,212 GBP

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
£534 GBP