CaratHunter
Plans
Heart|Lab Grown|IGI

1.23ct E SI1 Heart Lab Grown Diamond

EX • E/SI1 • IGI LG592320623

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG592320623

Diamond specifications and retailer prices

From HK$4,922 HKD
As of November 4, 2026
Save HK$2,053 HKD (29%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: HK$6,975 HKD at Brilliant Earth · As of November 5, 2026
View at Brilliant Earth

About this 1.23ct lab-grown heart diamond

This 1.23ct lab-grown heart sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG592320623 or 592320623. Listed at 2 retailers as of November 4, 2026, with prices from HK$4,922 to HK$6,975, a HK$2,053 spread on the same certified stone. Brilliant Earth lists it at HK$6,975. 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

1.23
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle35.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG592320623
Dimensions6.56 × 7.47 × 4.18 mm
L/W Ratio1.14
Girdle conditionFaceted
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
6.56 mm7.47 mm1.23 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG592320623
Side View
Table 57.0%Crown 34.4°Girdle: MediumPavilion 35.2°Culet: NoneDepth 56.0%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: HK$6,975 HKD|Low: HK$3,323 HKD|High: HK$8,856 HKD|Avg: HK$4,998 HKD|-21.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 5, 2026
Retailer 6HK$3,323 HKD
Retailer 4HK$3,370 HKD
Retailer 3HK$3,668 HKD
Retailer 5HK$4,467 HKD
Retailer 2HK$4,922 HKD
Retailer 8HK$5,557 HKD
Brilliant EarthHK$6,975 HKD
Retailer 7HK$7,085 HKD

6 data points across 8 retailers

2 retailersHK$4,922 HKD to HK$6,975 HKD

B
Cheapest Retailer
-
HK$4,922 HKD
Most Expensive
B
Brilliant Earth
17101859A · Nov 5
HK$6,975 HKD
$890 USD
View
1 more retailer has this diamond
Prices start from HK$4,922 HKDSave up to HK$2,053 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
1.23ct Heart
HK$4,922 HKD