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Radiant|Lab Grown|IGI

1.55ct G SI1 Radiant Lab Grown Diamond

EX • G/SI1 • IGI LG619423774

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG619423774

Diamond specifications and retailer prices

From HK$2,990 HKD
£300 GBP
As of October 27, 2026
Save HK$933 HKD (24%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: HK$8,003 HKD at Brilliant Earth · As of October 26, 2026
View at Brilliant Earth

About this 1.55ct lab-grown radiant diamond

This 1.55ct lab-grown radiant sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG619423774 or 619423774. Listed at 13 retailers as of October 27, 2026, with a 31% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.55
Carat
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle48.7°
Pavilion angle33.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG619423774
Dimensions8.45 × 5.58 × 3.75 mm
L/W Ratio1.51
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.45 mm5.58 mm1.55 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG619423774
Side View
Table 64.0%Crown 48.7°Girdle: MediumPavilion 33.9°Culet: NoneDepth 67.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 27
Current: HK$8,003 HKD|Low: HK$1,302 HKD|High: HK$8,788 HKD|Avg: HK$3,652 HKD|-8.9%
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
October 27, 2026
Retailer 10HK$1,357 HKD
Retailer 6HK$1,514 HKD
Retailer 3HK$1,577 HKD
Retailer 4HK$1,679 HKD
Retailer 11HK$1,679 HKD
Retailer 8HK$2,834 HKD
Retailer 2HK$2,990 HKD
Retailer 13HK$2,997 HKD
Retailer 9HK$4,292 HKD
Retailer 5HK$4,331 HKD
Retailer 12HK$5,406 HKD
Retailer 7HK$7,872 HKD
Brilliant EarthHK$8,003 HKD

38 data points across 13 retailers

13 retailersHK$2,990 HKD to HK$3,923 HKD

Retailer 1
-
HK$1,357 HKD
$173 USD
Price last confirmed 10 days ago
Retailer 2
-
HK$1,577 HKD
$201 USD
View
Price last confirmed 9 days ago
Retailer 3
-
HK$1,679 HKD
$214 USD
View
Price last confirmed 8 days ago
Retailer 4
-
HK$1,679 HKD
$214 USD
View
Price last confirmed 8 days ago
Retailer 5
-
HK$2,834 HKD
€344 EUR
View
Price last confirmed 10 days ago
A
Retailer 6
-
HK$2,990 HKD
£300 GBP
View
Retailer 7
-
HK$2,997 HKD
$382 USD
View
Price last confirmed 8 days ago
B+
Retailer 8
-
HK$3,923 HKD
$500 USD
View
Retailer 9
-
HK$4,292 HKD
$547 USD
View
Price last confirmed 7 days ago
Retailer 10
-
HK$4,331 HKD
$552 USD
View
Price last confirmed 7 days ago
Retailer 11
-
HK$5,406 HKD
$689 USD
View
Price last confirmed 8 days ago
Retailer 12
-
HK$7,872 HKD
£790 GBP
View
Price last confirmed 7 days ago
Most Expensive
Brilliant Earth
14997064A · Oct 26
HK$8,003 HKD
$1,020 USD
View
Price last confirmed 7 days ago
12 more retailers have this diamond
Prices start from HK$2,990 HKDSave up to HK$933 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
1.55ct Radiant
HK$2,990 HKD