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Marquise|Lab Grown|IGI

1.57ct F SI1 Marquise Lab Grown Diamond

EX • F/SI1 • IGI LG786667721

Certificate IGI LG786667721

Diamond specifications and retailer prices

From HK$5,124 HKD
£514 GBP
As of November 2, 2026
Save HK$4,684 HKD (48%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: HK$9,808 HKD at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.57ct lab-grown marquise diamond

This 1.57ct lab-grown marquise sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG786667721 or 786667721. Listed at 2 retailers as of November 2, 2026, with prices from HK$5,124 to HK$9,808, a HK$4,684 spread on the same certified stone. Brilliant Earth lists it at HK$9,808. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.57
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG786667721
Dimensions12.10 × 5.97 × 3.84 mm
L/W Ratio2.03
Top View
12.10 mm5.97 mm1.57 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG786667721
Side View
Table 57.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 64.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: HK$9,808 HKD|Low: HK$5,124 HKD|High: HK$9,808 HKD|Avg: HK$6,685 HKD
Brilliant Earth
Retailer 2
April 14, 2026
Retailer 2HK$5,124 HKD
Brilliant EarthHK$9,808 HKD

2 data points across 2 retailers

2 retailersHK$5,124 HKD to HK$9,808 HKD

B+
Cheapest Retailer
-
HK$5,124 HKD
£514 GBP
Most Expensive
B
Brilliant Earth
18325443A · Nov 2
HK$9,808 HKD
$1,250 USD
View
1 more retailer has this diamond
Prices start from HK$5,124 HKDSave up to HK$4,684 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.

B+
1.57ct Marquise
HK$5,124 HKD