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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 HK$3,844 HKD
$490 USD
As of October 30, 2026
Save HK$24,557 HKD (86%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: HK$28,401 HKD 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 HK$3,844 to HK$28,401, a HK$24,557 spread on the same certified stone. Brilliant Earth lists it at HK$28,401. 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: HK$28,401 HKD|Low: HK$3,687 HKD|High: HK$36,169 HKD|Avg: HK$11,060 HKD|-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
October 31, 2026
Retailer 6HK$3,844 HKD
Retailer 7HK$4,292 HKD
Retailer 11HK$4,307 HKD
Retailer 8HK$4,762 HKD
Retailer 12HK$4,762 HKD
Retailer 3HK$4,933 HKD
Retailer 19HK$5,845 HKD
Retailer 17HK$6,969 HKD
Retailer 9HK$7,231 HKD
Retailer 15HK$7,422 HKD
Retailer 13HK$7,923 HKD
Retailer 18HK$8,191 HKD
Retailer 14HK$10,435 HKD
Retailer 16HK$11,097 HKD
Retailer 10HK$12,537 HKD
Retailer 4HK$16,623 HKD
Retailer 5HK$17,825 HKD
Retailer 20HK$19,998 HKD
Retailer 2HK$22,102 HKD
Brilliant EarthHK$28,401 HKD

37 data points across 20 retailers

25 retailersHK$3,844 HKD to HK$28,401 HKD

A
Cheapest Retailer
-
HK$3,844 HKD
$490 USD
A
Retailer 2
-
HK$4,292 HKD
$547 USD
View
Final sale: no returns
A
Retailer 3
-
HK$4,307 HKD
$549 USD
View
Retailer 4
-
HK$4,762 HKD
$607 USD
View
Price last confirmed 15 days ago
A
Retailer 5
-
HK$4,762 HKD
$607 USD
View
Retailer 6
-
HK$4,933 HKD
£495 GBP
View
Price last confirmed 14 days ago
A
Retailer 7
-
HK$5,845 HKD
$745 USD
View
A
Retailer 8
-
HK$6,969 HKD
€846 EUR
View
A
Retailer 9
-
HK$7,231 HKD
A$1,418 AUD
View
A
Retailer 10
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HK$7,242 HKD
$923 USD
View
A
Retailer 11
-
HK$7,422 HKD
$946 USD
View
A
Retailer 12
-
HK$7,923 HKD
£795 GBP
View
A
Retailer 13
-
HK$8,191 HKD
ZAR 16,866 ZAR
View
A
Retailer 14
-
HK$10,364 HKD
$1,321 USD
View
A
Retailer 15
-
HK$10,435 HKD
$1,330 USD
View
Retailer 16
-
HK$10,563 HKD
$1,346 USD
View
Price last confirmed 7 days ago
A
Retailer 17
-
HK$11,097 HKD
A$2,176 AUD
View
A
Retailer 18
-
HK$12,537 HKD
$1,598 USD
View
B+
Retailer 19
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HK$15,536 HKD
$1,980 USD
View
B+
Retailer 20
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HK$16,623 HKD
$2,119 USD
View
B+
Retailer 21
-
HK$17,825 HKD
$2,272 USD
View
B+
Retailer 22
-
HK$19,998 HKD
£2,007 GBP
View
B+
Retailer 23
-
HK$20,799 HKD
$2,651 USD
View
B+
Retailer 24
-
HK$22,102 HKD
A$4,334 AUD
View
Most Expensive
B
Brilliant Earth
21063499A · Oct 30
HK$28,401 HKD
$3,620 USD
View
24 more retailers have this diamond
Prices start from HK$3,844 HKDSave up to HK$24,557 HKD

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
HK$3,844 HKD